An optical source that emits photons in a coherent beam. Light Amplification by Stimulated Emission of Radiation (LASER) is brought about using devices that transform light of varying frequencies into a single intense, nearly nondivergent beam of monochromatic radiation. Lasers operate in the infrared, visible, ultraviolet, or X-ray regions of the spectrum.
Lasers which use a solid, as opposed to a liquid or gas, as the lasing medium. Common materials used are crystals, such as YAG (YTTRIUM aluminum garnet); alexandrite; and CORUNDUM, doped with a rare earth element such as a NEODYMIUM; ERBIUM; or HOLMIUM. The output is sometimes additionally modified by addition of non-linear optical materials such as potassium titanyl phosphate crystal, which for example is used with neodymium YAG lasers to convert the output light to the visible range.
The use of green light-producing LASERS to stop bleeding. The green light is selectively absorbed by HEMOGLOBIN, thus triggering BLOOD COAGULATION.
Treatment using irradiation with LASER light of low power intensity so that the effects are not due to heat, as they are in LASER THERAPY.
Gas lasers with excited dimers (i.e., excimers) as the active medium. The most commonly used are rare gas monohalides (e.g., argon fluoride, xenon chloride). Their principal emission wavelengths are in the ultraviolet range and depend on the monohalide used (e.g., 193 nm for ArF, 308 nm for Xe Cl). These lasers are operated in pulsed and Q-switched modes and used in photoablative decomposition involving actual removal of tissue. (UMDNS, 2005)
Tunable liquid lasers with organic compounds (i.e., dye) which have a strong absorption band, used as the active medium. During emission, the dye has to be optically excited by another light source (e.g., another laser or flash lamp). The range of the emission wavelength may be anywhere from the ultraviolet to the near infrared (i.e., from 180 to 1100nm). These lasers are operated in continuous wave and pulsed modes. (UMDNS, 2005)
A scanning microscope-based, cytofluorimetry technique for making fluorescence measurements and topographic analysis on individual cells. Lasers are used to excite fluorochromes in labeled cellular specimens. Fluorescence is detected in multiple discrete wavelengths and the locational data is processed to quantitatively assess APOPTOSIS; PLOIDIES; cell proliferation; GENE EXPRESSION; PROTEIN TRANSPORT; and other cellular processes.
A surgical procedure to correct MYOPIA by CORNEAL STROMA subtraction. It involves the use of a microkeratome to make a lamellar dissection of the CORNEA creating a flap with intact CORNEAL EPITHELIUM. After the flap is lifted, the underlying midstroma is reshaped with an EXCIMER LASER and the flap is returned to its original position.
A technique utilizing a laser coupled to a catheter which is used in the dilatation of occluded blood vessels. This includes laser thermal angioplasty where the laser energy heats up a metal tip, and direct laser angioplasty where the laser energy directly ablates the occlusion. One form of the latter approach uses an EXCIMER LASER which creates microscopically precise cuts without thermal injury. When laser angioplasty is performed in combination with balloon angioplasty it is called laser-assisted balloon angioplasty (ANGIOPLASTY, BALLOON, LASER-ASSISTED).
Techniques using a laser to cut away and harvest a specific cell or cluster of cells from a tissue section while viewing it under the microscope.
A light microscopic technique in which only a small spot is illuminated and observed at a time. An image is constructed through point-by-point scanning of the field in this manner. Light sources may be conventional or laser, and fluorescence or transmitted observations are possible.
The performance of dissections with the aid of a microscope.
A method of non-invasive, continuous measurement of MICROCIRCULATION. The technique is based on the values of the DOPPLER EFFECT of low-power laser light scattered randomly by static structures and moving tissue particulates.
Surgical techniques on the CORNEA employing LASERS, especially for reshaping the CORNEA to correct REFRACTIVE ERRORS.
The coagulation of tissue by an intense beam of light, including laser (LASER COAGULATION). In the eye it is used in the treatment of retinal detachments, retinal holes, aneurysms, hemorrhages, and malignant and benign neoplasms. (Dictionary of Visual Science, 3d ed)
Examination of the interior of the eye with an ophthalmoscope.
That portion of the electromagnetic spectrum usually sensed as heat. Infrared wavelengths are longer than those of visible light, extending into the microwave frequencies. They are used therapeutically as heat, and also to warm food in restaurants.
A type of refractive surgery of the CORNEA to correct MYOPIA and ASTIGMATISM. An EXCIMER LASER is used directly on the surface of the EYE to remove some of the CORNEAL EPITHELIUM thus reshaping the anterior curvature of the cornea.
Argon. A noble gas with the atomic symbol Ar, atomic number 18, and atomic weight 39.948. It is used in fluorescent tubes and wherever an inert atmosphere is desired and nitrogen cannot be used.
Devices for examining the interior of the eye, permitting the clear visualization of the structures of the eye at any depth. (UMDNS, 1999)
Neon. A noble gas with the atomic symbol Ne, atomic number 10, and atomic weight 20.18. It is found in the earth's crust and atmosphere as an inert, odorless gas and is used in vacuum tubes and incandescent lamps.
Methods of creating machines and devices.
Visualization of a vascular system after intravenous injection of a fluorescein solution. The images may be photographed or televised. It is used especially in studying the retinal and uveal vasculature.
Erbium. An element of the rare earth family of metals. It has the atomic symbol Er, atomic number 68, and atomic weight 167.26.
The technology of transmitting light over long distances through strands of glass or other transparent material.
Thin strands of transparent material, usually glass, that are used for transmitting light waves over long distances.
Clarity or sharpness of OCULAR VISION or the ability of the eye to see fine details. Visual acuity depends on the functions of RETINA, neuronal transmission, and the interpretative ability of the brain. Normal visual acuity is expressed as 20/20 indicating that one can see at 20 feet what should normally be seen at that distance. Visual acuity can also be influenced by brightness, color, and contrast.
Endoscopic examination, therapy or surgery of the fetus and amniotic cavity through abdominal or uterine entry.
The joining of pieces of metal through the use of an alloy which has a lower melting point, usually at least 100 degrees Celsius below the fusion temperature of the parts being soldered. In dentistry, soldering is used for joining components of a dental appliance, as in assembling a bridge, joining metals to orthodontic bands, or adding to the bulk of certain structures, such as the establishment of proper contact areas on inlays and crowns with adjacent teeth. (Illustrated Dictionary of Dentistry, 1982)
Techniques using laser energy in combination with a balloon catheter to perform angioplasty. These procedures can take several forms including: 1, laser fiber delivering the energy while the inflated balloon centers the fiber and occludes the blood flow; 2, balloon angioplasty immediately following laser angioplasty; or 3, laser energy transmitted through angioplasty balloons that contain an internal fiber.
The concave interior of the eye, consisting of the retina, the choroid, the sclera, the optic disk, and blood vessels, seen by means of the ophthalmoscope. (Cline et al., Dictionary of Visual Science, 4th ed)
A specialized field of physics and engineering involved in studying the behavior and properties of light and the technology of analyzing, generating, transmitting, and manipulating ELECTROMAGNETIC RADIATION in the visible, infrared, and ultraviolet range.
Measurement of distances or movements by means of the phenomena caused by the interference of two rays of light (optical interferometry) or of sound (acoustic interferometry).
The transparent anterior portion of the fibrous coat of the eye consisting of five layers: stratified squamous CORNEAL EPITHELIUM; BOWMAN MEMBRANE; CORNEAL STROMA; DESCEMET MEMBRANE; and mesenchymal CORNEAL ENDOTHELIUM. It serves as the first refracting medium of the eye. It is structurally continuous with the SCLERA, avascular, receiving its nourishment by permeation through spaces between the lamellae, and is innervated by the ophthalmic division of the TRIGEMINAL NERVE via the ciliary nerves and those of the surrounding conjunctiva which together form plexuses. (Cline et al., Dictionary of Visual Science, 4th ed)
The thin, highly vascular membrane covering most of the posterior of the eye between the RETINA and SCLERA.
The evaluation of incidents involving the loss of function of a device. These evaluations are used for a variety of purposes such as to determine the failure rates, the causes of failures, costs of failures, and the reliability and maintainability of devices.
A refractive error in which rays of light entering the EYE parallel to the optic axis are brought to a focus in front of the RETINA when accommodation (ACCOMMODATION, OCULAR) is relaxed. This results from an overly curved CORNEA or from the eyeball being too long from front to back. It is also called nearsightedness.
Chemical bond cleavage reactions resulting from absorption of radiant energy.
The most anterior portion of the uveal layer, separating the anterior chamber from the posterior. It consists of two layers - the stroma and the pigmented epithelium. Color of the iris depends on the amount of melanin in the stroma on reflection from the pigmented epithelium.
Therapy using oral or topical photosensitizing agents with subsequent exposure to light.
Elements of limited time intervals, contributing to particular results or situations.
Fluid accumulation in the outer layer of the MACULA LUTEA that results from intraocular or systemic insults. It may develop in a diffuse pattern where the macula appears thickened or it may acquire the characteristic petaloid appearance referred to as cystoid macular edema. Although macular edema may be associated with various underlying conditions, it is most commonly seen following intraocular surgery, venous occlusive disease, DIABETIC RETINOPATHY, and posterior segment inflammatory disease. (From Survey of Ophthalmology 2004; 49(5) 470-90)
The pressure of the fluids in the eye.
The ten-layered nervous tissue membrane of the eye. It is continuous with the OPTIC NERVE and receives images of external objects and transmits visual impulses to the brain. Its outer surface is in contact with the CHOROID and the inner surface with the VITREOUS BODY. The outer-most layer is pigmented, whereas the inner nine layers are transparent.
Disease of the RETINA as a complication of DIABETES MELLITUS. It is characterized by the progressive microvascular complications, such as ANEURYSM, interretinal EDEMA, and intraocular PATHOLOGIC NEOVASCULARIZATION.
Operative procedures performed on the SKIN.
Agents that emit light after excitation by light. The wave length of the emitted light is usually longer than that of the incident light. Fluorochromes are substances that cause fluorescence in other substances, i.e., dyes used to mark or label other compounds with fluorescent tags.
An ocular disease, occurring in many forms, having as its primary characteristics an unstable or a sustained increase in the intraocular pressure which the eye cannot withstand without damage to its structure or impairment of its function. The consequences of the increased pressure may be manifested in a variety of symptoms, depending upon type and severity, such as excavation of the optic disk, hardness of the eyeball, corneal anesthesia, reduced visual acuity, seeing of colored halos around lights, disturbed dark adaptation, visual field defects, and headaches. (Dictionary of Visual Science, 4th ed)
Fluorescence microscopy utilizing multiple low-energy photons to produce the excitation event of the fluorophore. Multiphoton microscopes have a simplified optical path in the emission side due to the lack of an emission pinhole, which is necessary with normal confocal microscopes. Ultimately this allows spatial isolation of the excitation event, enabling deeper imaging into optically thick tissue, while restricting photobleaching and phototoxicity to the area being imaged.
The lamellated connective tissue constituting the thickest layer of the cornea between the Bowman and Descemet membranes.
Discrete concentrations of energy, apparently massless elementary particles, that move at the speed of light. They are the unit or quantum of electromagnetic radiation. Photons are emitted when electrons move from one energy state to another. (From Hawley's Condensed Chemical Dictionary, 11th ed)
The performance of surgical procedures with the aid of a microscope.
Microscopy in which the object is examined directly by an electron beam scanning the specimen point-by-point. The image is constructed by detecting the products of specimen interactions that are projected above the plane of the sample, such as backscattered electrons. Although SCANNING TRANSMISSION ELECTRON MICROSCOPY also scans the specimen point by point with the electron beam, the image is constructed by detecting the electrons, or their interaction products that are transmitted through the sample plane, so that is a form of TRANSMISSION ELECTRON MICROSCOPY.
An imaging method using LASERS that is used for mapping subsurface structure. When a reflective site in the sample is at the same optical path length (coherence) as the reference mirror, the detector observes interference fringes.
Drugs that are pharmacologically inactive but when exposed to ultraviolet radiation or sunlight are converted to their active metabolite to produce a beneficial reaction affecting the diseased tissue. These compounds can be administered topically or systemically and have been used therapeutically to treat psoriasis and various types of neoplasms.
An element of the rare earth family of metals. It has the atomic symbol Y, atomic number 39, and atomic weight 88.91. In conjunction with other rare earths, yttrium is used as a phosphor in television receivers and is a component of the yttrium-aluminum garnet (YAG) lasers.
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
Surgical removal of a section of the iris.
The diversion of RADIATION (thermal, electromagnetic, or nuclear) from its original path as a result of interactions or collisions with atoms, molecules, or larger particles in the atmosphere or other media. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Methods used to remove unwanted facial and body hair.
The outer covering of the body that protects it from the environment. It is composed of the DERMIS and the EPIDERMIS.
That portion of the electromagnetic spectrum in the visible, ultraviolet, and infrared range.
Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.
Tongues of skin and subcutaneous tissue, sometimes including muscle, cut away from the underlying parts but often still attached at one end. They retain their own microvasculature which is also transferred to the new site. They are often used in plastic surgery for filling a defect in a neighboring region.
Methods and procedures for the diagnosis of diseases of the eye or of vision disorders.
A pathological process consisting of the formation of new blood vessels in the CHOROID.
The flow of BLOOD through or around an organ or region of the body.
The performance of dissections, injections, surgery, etc., by the use of micromanipulators (attachments to a microscope) that manipulate tiny instruments.
Products or parts of products used to detect, manipulate, or analyze light, such as LENSES, refractors, mirrors, filters, prisms, and OPTICAL FIBERS.
The blood vessels which supply and drain the RETINA.
The separation and isolation of tissues for surgical purposes, or for the analysis or study of their structures.
Enlarged and tortuous VEINS.
Measurement of the index of refraction (the ratio of the velocity of light or other radiation in the first of two media to its velocity in the second as it passes from one into the other).
Treatment of disease by exposure to light, especially by variously concentrated light rays or specific wavelengths.
Analysis of the intensity of Raman scattering of monochromatic light as a function of frequency of the scattered light.
The property of nonisotropic media, such as crystals, whereby a single incident beam of light traverses the medium as two beams, each plane-polarized, the planes being at right angles to each other. (Cline et al., Dictionary of Visual Science, 4th ed)
A technique that uses LASERS to trap, image, and manipulate small objects (biomolecules, supramolecular assembles, DENDRIMERS) in three dimensional space. (From Glossary of Biotechnology and Nanobiotechnology Terms, 4th ed.)
The portion of the optic nerve seen in the fundus with the ophthalmoscope. It is formed by the meeting of all the retinal ganglion cell axons as they enter the optic nerve.
A noble gas that is found in the atmosphere. It has the atomic symbol Kr, atomic number 36, atomic weight 83.80, and has been used in electric bulbs.
Restoration of integrity to traumatized tissue.
Slender processes of NEURONS, including the AXONS and their glial envelopes (MYELIN SHEATH). Nerve fibers conduct nerve impulses to and from the CENTRAL NERVOUS SYSTEM.

Fluorimetric multiparameter cell assay at the single cell level fabricated by optical tweezers. (1/3679)

A fluorimetric multi-parameter cell sensor at the single cell level is presented which makes it possible to observe the physiological behavior of different cell lines, different physiological parameters, and statistical data at the same time. Different cell types were immobilized at predefined positions with high accuracy using optical tweezers and adhesion promoting surface layers. The process is applicable to both adherent and non-adherent cells. Coating of the immobilization area with mussel adhesive protein was shown to be essential for the process. Intracellular proton and calcium concentrations in different cell classes were simultaneously imaged and the specific activation of T lymphocytes was demonstrated. This method should be especially useful for drug screening due to the small sample volume and high information density.  (+info)

A repetitive mode of activation of discrete Ca2+ release events (Ca2+ sparks) in frog skeletal muscle fibres. (2/3679)

1. Ca2+ release events (Ca2+ 'sparks'), which are believed to arise from the opening of a sarcoplasmic reticulum (SR) Ca2+ release channel or a small cluster of such channels that act as a release unit, have been measured in single, frog (Rana pipiens) skeletal muscle fibres. 2. Under conditions of extremely low rates of occurrence of Ca2+ sparks we observed, within individual identified triads, repetitive Ca2+ release events which occurred at a frequency more than 100-fold greater than the prevailing average event rate. Repetitive sparks were recorded during voltage-clamp test depolarizations after a brief (0.3-2 s) repriming interval in fibres held at 0 mV and in chronically depolarized, 'notched' fibres. 3. These repetitive events are likely to arise from the re-opening of the same SR Ca2+ release channel or release unit operating in a repetitive gating mode ('rep-mode'), rather than from the random activation of multiple, independent channels or release units within a triad. A train of rep-mode events thus represents a series of Ca2+ sparks arising from a single location within the fibre. Rep-mode events are activated among different triads in a random manner after brief repriming. The frequency of repetitive events among all identified events during voltage-clamp depolarization to 0 mV after brief repriming was 3.9 +/- 1.3 %. The occurrence of repetitive events was not related to exposure of the fibre to laser illumination. 4. The events observed within a rep-mode train exhibited a relatively uniform amplitude. Analysis of intervals between identified events in triads exhibiting rep-mode trains indicated similar variations of fluorescence as in neighbouring, quiescent triads, suggesting there was not a significant number of small, unidentified events at the triads exhibiting rep-mode activity. 5. The distribution of rep-mode interspark intervals exhibited a paucity of events at short intervals, consistent with the need for recovery from inactivation before activation of the next event in a repetitive train. The mean interspark interval of repetitive sparks during voltage-clamp depolarizations was 88 +/- 5 ms, and was independent of membrane potential. 6. The individual Ca2+ sparks within a rep-mode train were similar in average amplitude and spatiotemporal extent to singly occurring sparks, suggesting a common mechanism for termination of the channel opening(s) underlying both types of events. The average properties of the sparks did not vary during a train. The relative amplitude of a spark within a rep-mode was not correlated with its rise time. 7. Repetitive Ca2+ release events represent a mode of gating of SR Ca2+ release channels which may be significant during long depolarizations and which may be influenced by the biochemical state of the SR ryanodine receptor Ca2+ release channels.  (+info)

Elimination of EVE protein by CALI in the short germ band insect Tribolium suggests a conserved pair-rule function for even skipped. (3/3679)

The question of the degree of evolutionary conservation of the pair-rule patterning mechanism known from Drosophila is still contentious. We have employed chromophore-assisted laser inactivation (CALI) to inactivate the function of the pair-rule gene even skipped (eve) in the short germ embryo of the flour beetle Tribolium. We show that it is possible to generate pair-rule type phenocopies with defects in alternating segments. Interestingly, we find the defects in odd numbered segments and not in even numbered ones as in Drosophila. However, this apparent discrepancy can be explained if one takes into account that the primary action of eve is at the level of parasegments and that different cuticular markers are used for defining the segment borders in the two species. In this light, we find that eve appears to be required for the formation of the anterior borders of the same odd numbered parasegments in both species. We conclude that the primary function of eve as a pair rule gene is conserved between the two species.  (+info)

Enhanced hatching rate of bovine IVM/IVF/IVC blastocysts using a 1.48-micron diode laser beam. (4/3679)

PURPOSE: Our purpose was to test whether zona pellucida (ZP) drilling using a 1.48-micron diode laser beam on bovine IVM/IVF/IVC blastocysts is effective for embryo hatching. METHODS: Blastocysts produced in vitro at day 7 after IVF were divided into control and laser-drilled groups, respectively. RESULTS: When the rates of in vitro development of bovine embryos were examined, the average cleavage rate (> or = two-cell) was 82.3% and the blastocyst rate at day 7 after IVF was 32.5%. Using these blastocysts, when the laser drilling effect was investigated at 48 hr after treatment, the total hatching rate in the laser-drilled group (98.0%) was significantly higher than that in the control group (60.0%) (P < 0.001). Especially, the hatched rate of the laser-drilled group (68.0%) was significantly enhanced compared with that of the control group (30.0%) (P < 0.001). CONCLUSIONS: These results demonstrated that laser ZP drilling on bovine IVM/IVF/IVC blastocysts can significantly increase the hatching rate.  (+info)

Altered ligand rebinding kinetics due to distal-side effects in hemoglobin chico (Lysbeta66(E10) --> thr). (5/3679)

Hb Chico is an unusual human hemoglobin variant that has lowered oxygen affinity, but unaltered cooperativity and anion sensitivity. Previous studies showed these features to be associated with distal-side heme pocket alterations that confer increased structural rigidity on the molecule and that increase water content in the beta-chain heme pocket. We report here that the extent of nanosecond geminate rebinding of oxygen to the variant and its isolated beta-chains is appreciably decreased. Structural alterations in this variant decrease its oxygen recombination rates without significantly altering rates of migration out of the heme pocket. Data analysis indicates that one or more barriers that impede rebinding of oxygen from docking sites in the heme pocket are increased, with less consequence for CO rebinding. Resonance Raman spectra show no significant alterations in spectral regions sensitive to interactions between the heme iron and the proximal histidine residue, confirming that the functional differences in the variant are due to distal-side heme pocket alterations. These effects are discussed in the context of a schematic representation of heme pocket wells and barriers that could aid the design of novel hemoglobins with altered ligand affinity without loss of the normal allosteric responses that facilitate unloading of oxygen to respiring tissues.  (+info)

Laser induced phagocytosis in the pigment epithelium of the Hunter dystrophic rat. (6/3679)

The retinae of 14-day-old Hunter dystrophic rats have been subjected to low-energy irradiation by a pulsed ruby laser. Fifteen days after exposure, pigment epithelial cells had proliferated and repopulated the irradiated areas. In all such areas the subretinal photoreceptor debris had been reduced or lost.  (+info)

Undercarboxylation of recombinant prothrombin revealed by analysis of gamma-carboxyglutamic acid using capillary electrophoresis and laser-induced fluorescence. (7/3679)

The gamma-carboxyglutamic acid (Gla) content of several variants of human prothrombin has been measured by using capillary electrophoresis and laser-induced fluorescence (CE-LIF). Both plasma-derived prothrombin and recombinant prothrombin contain ten residues of Gla per molecule of protein. In contrast, a variant of human prothrombin (containing the second kringle domain of bovine prothrombin) was separated into two populations that differed in their Gla content. Direct measurement of the Gla content showed an association with the presence or absence of the calcium-dependent conformational change that is required for prothombinase function. Thus, the CE-LIF assay is useful in determining the carboxylation status of recombinant proteins.  (+info)

High-speed, random-access fluorescence microscopy: II. Fast quantitative measurements with voltage-sensitive dyes. (8/3679)

An improved method for making fast quantitative determinations of membrane potential with voltage-sensitive dyes is presented. This method incorporates a high-speed, random-access, laser-scanning scheme (Bullen et al., 1997. Biophys. J. 73:477-491) with simultaneous detection at two emission wavelengths. The basis of this ratiometric approach is the voltage-dependent shift in the emission spectrum of the voltage-sensitive dye di-8-butyl-amino-naphthyl-ethylene-pyridinium-propyl-sulfonate (di-8-ANEPPS). Optical measurements are made at two emission wavelengths, using secondary dichroic beamsplitting and dual photodetectors (<570 nm and >570 nm). Calibration of the ratiometric measurements between signals at these wavelengths was achieved using simultaneous optical and patch-clamp measurements from adjacent points. Data demonstrating the linearity, precision, and accuracy of this technique are presented. Records obtained with this method exhibited a voltage resolution of approximately 5 mV, without any need for temporal or spatial averaging. Ratiometric recordings of action potentials from isolated hippocampal neurons are used to illustrate the usefulness of this approach. This method is unique in that it is the first to allow quantitative determination of dynamic membrane potential changes in a manner optimized for both high spatiotemporal resolution (2 micrometers and <0.5 ms) and voltage discrimination.  (+info)

TY - JOUR. T1 - Time-resolved laser-induced fluorescence spectroscopy as a diagnostic instrument in head and neck carcinoma. AU - Meier, Jeremy D.. AU - Xie, Hongtao. AU - Sun, Yang. AU - Sun, Yinghua. AU - Hatami, Nisa. AU - Poirier, Brian. AU - Marcu, Laura. AU - Farwell, D Gregory. PY - 2010/6. Y1 - 2010/6. N2 - Objective: The objectives of this study were to 1) determine differences in lifetime fluorescence between normal and malignant tissue of the upper aerodigestive tract, and 2) evaluate the potential of time-resolved laser-induced fluorescence spectroscopy (TR-LIFS) as a diagnostic instrument for head and neck squamous cell carcinoma (HNSCC). Study Design: Cross-sectional study. Setting: University-based medical center. Subjects and Methods: Nine patients with suspected HNSCC were included. In the operating room, a nitrogen pulse laser (337 nm, 700-picosecond pulse width) was used to induce tissue autofluorescence of normal tissue and suspected malignant lesions. Spectral intensities ...
In the modern world optical sensor systems have a vast number of applications. In this research work the system composed of the two cameras and the laser illumination with the 49 lasers is considered. In the previous research work we proposed the general calibration technique for this system. It was shown that the most complicated subtask in this technique is determining the beam directions for the laser illumination calibration because it couldnt be solved using the known algorithms. The main stages which are required to execute for determining the beam directions for the laser illumination are: tracking of the laser illumination points in the image sequence of the calibration object; calculation of the coordinates in space for the found laser illumination points; constructing the laser beams in space passing close as much as possible to the found points. Within the scope of the research carried out, all the main stages for determining the beam directions for the laser illumination are ...
We present a lateral laser speckle contrast analysis method combined with line beam scanning illumination to improve the sampling depth of blood flow imaging. Both the phantom and animal experimental results suggest that localized illumination and lateral speckle contrast analysis can significantly enhance the deep blood flow signal to improve the sampling depth of laser speckle contrast imaging compared with the traditional full-field illumination laser speckle contrast analysis method.. © 2012 Optical Society of America. Full Article , PDF Article ...
The strongly localized interaction process of ultrashort laser pulses with tissue makes femtosecond lasers a powerful tool for eye surgery. These lasers are now routinely used in refractive surgery and other forms of surgery of the anterior segment of the eye. Several clinical laser systems also offer options for corneal grafting and the potential use of ultrashort pulse lasers in glaucoma surgery has been the object of several recent studies which have shown promising results. While devices aimed for interventions in clear tissue may be based on available solid state or fibre laser technology, the development of tools for surgery in more strongly scattering tissue has to account for the compromised tissular transparency and requires the development of optimized laser sources. The present paper focuses on surgery of clear and pathological cornea as well as sclera. It aims to give an overview over typical medical indications for ultrashort pulse laser surgery, the optics of the tissues involved, the
TY - JOUR. T1 - Determination of potassium in ceramic raw materials using laser-induced breakdown spectroscopy combined with profile fitting. AU - Tang, Yun. AU - Guo, Lianbo. AU - Tang, Shisong. AU - Chu, Yanwu. AU - Zeng, Qingdong. AU - Zeng, Xiaoyan. AU - Duan, Jun. AU - Lu, Yongfeng. PY - 2018/8/1. Y1 - 2018/8/1. N2 - The determination of potassium (K) content in ceramic raw materials provides important references for ceramic sintering. To realize rapid, in situ, and real-time analysis detection, a laser-induced breakdown spectroscopy (LIBS) system was set up to analyze K content in ceramic raw materials. However, the self-absorption was the serious influence on the accuracy of K element analysis. In this work, a method of profile fitting with Lorentz function was proposed to reduce the self-absorption effect in LIBS. After Lorentz fitting, the determination coefficient (R2 factor) for K element improved from 0.993 to 0.998, the root mean square error of cross-validation reduced from 0.458 ...
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Endoscopic resection of early colorectal neoplasms typically employs electrocautery tools, which lack precision and run the risk of full thickness thermal injury to the bowel wall with subsequent perforation. We present a means of endoluminal colonic ablation using picosecond laser pulses as a potential alternative to mitigate these limitations. High intensity ultrashort laser pulses enable nonlinear absorption processes, plasma generation, and as a consequence a predominantly non-thermal ablation regimen.. Robust process parameters for the laser resection are demonstrated using fresh ex vivo pig intestine samples. Square cavities with comparable thickness to early colorectal neoplasms are removed for a wavelength of 1030 nm and 515 nm using a picosecond laser system. The corresponding histology sections exhibit in both cases only minimal collateral damage to the surrounding tissue. The ablation depth can be controlled precisely by means of the pulse energy. Overall, the application of ultrafast ...
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A self-mode-locked ring cavity laser incorporating a laser crystal such as Ti:Sapphire includes an external cavity for producing self-starting of mode-locked operation. The external cavity receives a portion of one of the continuous wave beams from the ring cavity modulates it, and retroreflects it back to the ring cavity to initiate mode-locked unidirectional operation. The unidirectional mode-locked operation is in a direction which decouples the external cavity.
A laser diode, (LD), injection laser diode (ILD), or diode laser is a semiconductor device similar to a light-emitting diode in which the laser beam is created at the diodes junction. Laser diodes are the most common type of lasers produced, with a wide range of uses that include fiber optic communications, barcode readers, laser pointers, CD/DVD/Blu-ray disc reading/recording, laser printing, laser scanning and light beam illumination. A laser diode is electrically a PIN diode. The active region of the laser diode is in the intrinsic (I) region, and the carriers (electrons and holes) are pumped into that region from the N and P regions respectively. While initial diode laser research was conducted on simple P-N diodes, all modern lasers use the double-hetero-structure implementation, where the carriers and the photons are confined in order to maximize their chances for recombination and light generation. Unlike a regular diode, the goal for a laser diode is to recombine all carriers in the I ...
Age-related macular degeneration (AMD) is a condition affecting the retina and is the leading cause of vision loss. Dry AMD is caused by the accumulation of lipid deposits called drusen, which form under the retina. This work demonstrates, for the first time, the removal of drusen-like deposits underneath ARPE-19 cell layers using femtosecond laser pulses. A novel cell culture model was created in response to the limited access to primary cell lines and the absence of animal models that recapitulate all aspects of AMD. In the cell culture model, deposits were identified with fluorescent stains specific to known deposit constituents. Trains of sub-10 femtosecond laser pulses from a Ti:Sapphire laser were used to successfully ablate the deposits without causing damage to surrounding cells. This drusen removal method can be used as a potential treatment for dry-stage AMD.
We report on the frequency doubling of femtosecond laser pulses at 1030 nm center wavelength generated from the fully diode-pumped laser system POLARIS. The newly generated pulses at a center wavelength of 515 nm have a pulse energy of 3 J with a pulse duration of 120 fs. On the basis of initially ultra-high contrast seed pulses we expect a temporal intensity contrast better 10 17 200 ps before the peak of the main pulse. We analyzed the temporal intensity contrast from milliseconds to femtoseconds with a dynamic range covering more than 20 orders of magnitude. The pulses were focussed with a f/2-focussing parabola resulting in a peak intensity exceeding 10 20 W / cm 2 . The peak power and intensity
TY - JOUR. T1 - Supersonic jet/time-of-flight mass spectrometry of adenine using nanosecond and femtosecond lasers. AU - Lin, Cheng Huang. AU - Matsumoto, Junichi. AU - Ohtake, Satoshi. AU - Imasaka, Totaro. PY - 1996/11. Y1 - 1996/11. N2 - Mass spectra and ionization efficiencies of adenine were measured, with nanosecond (15 ns) and femtosecond (500 fs) laser pulses at identical energy levels. A molecular ion is clearly observed in both spectra, but the efficiency is improved 10-fold when a femtosecond laser is used, indicating the distinct advantage of ultrashort laser pulses for multiphoton ionization of nucleobases in supersonic jet spectrometry.. AB - Mass spectra and ionization efficiencies of adenine were measured, with nanosecond (15 ns) and femtosecond (500 fs) laser pulses at identical energy levels. A molecular ion is clearly observed in both spectra, but the efficiency is improved 10-fold when a femtosecond laser is used, indicating the distinct advantage of ultrashort laser pulses ...
Laser-induced breakdown spectroscopy (LIBS) coupled with the linear multivariate regression method was utilized to analyze chromium (Cr) quantitatively in potatoes. The plasma was generated using a Nd:YAG laser, and the spectra were acquired by an Andor spectrometer integrated with an ICCD detector. The models between intensity of LIBS characteristic line(s) and concentration of Cr were constructed to predict quantitatively the content of target. The unary, binary, ternary, and quaternary variables were chosen for verifying the accuracy of linear regression calibration curves. The intensity of characteristic lines Cr (CrI: 425.43, 427.48, 428.97 nm) and Ca (CaI: 422.67, 428.30, 430.25, 430.77, 431.86 nm) were used as input data for the multivariate calculations. According to the results of linear regression, the model of quaternary linear regression was established better in comparing with the other three models. A good agreement was observed between the actual content provided by atomic ...
MOUNTAIN VIEW, Calif., Oct. 27, 2011 - Mobius Photonics, an innovative producer of short pulsed fiber laser sources (IR, green, and UV laser), announces that its G1R2 laser source has been used in super-resolution microscopy experiments at the Max Planck Institute for Biophysical Chemistry (Göttingen, Germany). The experiments demonstrated that a laser-based fluorescence microscopy technique called stimulated emission depletion (STED) microscopy could be used to image intact, living, multicellular organisms.. Over the past few years, much research has focused on developing STED set-ups based on novel laser sources that could enhance the techniques capabilities-particularly the ability to generate ultra-high-resolution images of biological samples quickly and to use fluorescent protein variants of choice. The recent experiments at the Max Planck Institute successfully demonstrated multiple laser sources for imaging multicellular, living samples expressing green fluorescent protein ...
Laser-induced breakdown spectroscopy (LIBS) has been used to study bacterial spores, molds, pollens, and proteins. Biosamples were prepared and deposited onto porous silver substrates. LIBS data from the individual laser shots were analyzed by principal-components analysis and were found to contain adequate information to afford discrimination among the different biomaterials. Additional discrimination within the three bacilli studied appears feasible.. © 2003 Optical Society of America. Full Article , PDF Article ...
Laser-induced breakdown spectroscopy (LIBS) techniques have been studied and applied for more than half a century. The first plasma induced by a laser
We demonstrate an endoscopic imaging system for microscopic flow measurement (for example blood flow in tissue) using laser speckle contrast imaging. Computa...
Airborne silica dust (quartz) is common in coal mines and represents a respiratory hazard that can lead to silicosis, a potentially fatal lung disease. With an eye toward developing a portable monitoring device for rapid analysis of silica dust, laser-induced breakdown spectroscopy (LIBS) was used to quantify quartz in coal dust samples collected on filter media. Pure silica [Min-U-Sil(TM) 5], Geo
A study on the role of laser wavelength in keratoplasty assisted by ultrashort pulse lasers is presented. This article gives a summary of the principal physical mechanisms contributing to the transparency of healthy corneas and presents transparency measurements as well as laboratory experiments on tissue with lasers at different wavelengths. The transparency of a healthy cornea is strongly related to its regular structure at micrometer and nanometer length scales. Many indications for keratoplasty are associated with a perturbation of this structure and therefore with a sometimes strongly reduced tissue transparency. This explains the often unsatisfactory results obtained when using ultrashort pulse lasers for the procedure. Theoretical considerations and laboratory experiments show that the light scattering processes responsible for the loss in laser beam quality depend strongly on wavelength and the use of wavelengths longer than those presently used allows these processes to be almost
An electron microscope study has been made of vitally stained single cells whose cytoplasm has been subjected to a localized ruby laser microbeam. Light and moderate laser absorption (the resultant of stain concentration and laser energy density) produced restricted selective damage of mitochondria in cells stained with Janus green B; heavy laser absorption resulted in mitochondrial damage, as well as in nonselective interaction with other cell structures. With four other basic vital stains, the polysomes, ergastoplasm, mitochondria and other organelles at the irradiated site were uniformly damaged. Unstained cells showed no morphological alterations. With light primary damage (that restricted to the irradiation site), no secondary effects of the incident radiation were observed. With moderate primary damage, however, secondary damage of the mitochondria in the unirradiated cell portions was produced, which was reversible within 4 hr after irradiation. Heavy primary lesions caused severe ...
Storage Molded Glass Aspheric Laser Collimator, Glass Laser Collimating Lens We use the molded glass aspheric lens process creating the laser collimating lenses from diameter 2~15mm for the laser diode collimation and collimated beam applications. Laser Tube lens Collimating Coated Glass Lens for 405nm-450nm 520nm Violet/Blue Laser Diode Module by QIAOBA. Application. Details & FREE Returns Return this item for free. With over 35 standard lenses in LightPaths catalog to choose from, however, this can sometimes be a confusing task. Collimated laser diodes are an assembly of a laser diode with a specified collimating lens within a small package. 455 laser diode collimating lens products are offered for sale by suppliers on Alibaba.com, of which laser equipment parts accounts for 4%, lenses accounts for 1%. This is much more critical for non-coated lenses, since AR coatings help to protect the lens surfaces from humidity. By adjusting the distance between the laser diode and the collimating lens, ...
The cell selective introduction of therapeutic agents remains a challenging problem. Here we demonstrate spatially controlled cavitation instigated by laser-induced breakdown of an optically trapped single gold nanoparticle of diameter 100 nm. The energy breakdown threshold of the gold nanoparticle with a single nanosecond laser pulse at 532 nm is three orders of magnitude lower than water, which leads to nanocavitation allowing single cell transfection. We quantify the shear stress to cells from the expanding bubble and optimize the pressure to be in the range of ...
This document addresses the operational safety and human factors aspects of unauthorized laser illumination events in navigable airspace. The topics addressed include operational procedures, training, and protocols that flight crew members should follow in the event of a laser exposure. Of particu
TY - JOUR. T1 - Influence of hydrogen on paramagnetic defects induced by UV laser exposure in natural silica. AU - Boscaino, Roberto. AU - Messina, Fabrizio. AU - Cannas, Marco. PY - 2005. Y1 - 2005. N2 - Diffusion limited reactions of point defects were investigated in amorphous SiO2 exposed to UV laser light. Electron spin resonance and in situ absorption measurements at room temperature evidenced the annealing of E′ centers and the growth of H(II) centers both occurring in the post‐irradiation stage and lasting a few hours. These transients are caused by reactions involving molecular hydrogen H2, made available by dimerization of radiolytic H0.. AB - Diffusion limited reactions of point defects were investigated in amorphous SiO2 exposed to UV laser light. Electron spin resonance and in situ absorption measurements at room temperature evidenced the annealing of E′ centers and the growth of H(II) centers both occurring in the post‐irradiation stage and lasting a few hours. These ...
A study was made of the effects of laser radiation on the structure and function of the primate retina. The program encompasses the ocular effects of pulsed and CW laser radiation through: (1) Anatomical studies of laser-exposed and non-exposed tissue at the resolution of both light and electron optics. These are directed toward studies of the chemical morphology of retinal structures through enzyme and other staining techniques. (2) Analysis of bioelectric potentials in the visual system. The electroretinogram recorded from the intact eye is used to follow long-term effects of laser radiation. The LERG (localized electroretinogram) will be used to study localized effects of laser radiation. Single unit recording from the fourth-order neurons (LGN) of the visual system will be used to study photochemical effects of laser radiation. (3) Laser-induced changes in retinal metabolism are being investigated through autoradiographic studies of C14 labeled vitamin A. (4) Laser exposures of the macula
Absolute values of the two-photon absorption cross-sections of Rhodamine 6G, Rhodamine B, Acridine Red, Disodium Fluorescein and DODCI have been obtained by excitation with a neodymium: glass laser (1060 nm). Measurements over eight orders of magnitude of the exciting light flux were carried out by employing the laser both Q-switched and mode-locked. The two-photon fluorescence flux measurements were calibrated by single-photon fluorescence generated by excitation with second-harmonic laser pulses. The experimental results are compared with values predicted by semi-empirical theoretical models and good agreement is obtained. Two-photon amplification of the mode-locked neodymium laser by organic dyes is shown not to be practicable at present. Other possible two-photon oscillators are discussed. ...
Laser-induced cell transfer has been developed in recent years for the flexible and gentle printing of cells. Because of the high transfer rates and the superior cell survival rates, this technique has great potential for tissue engineering applications. However, the fact that material from an inorganic sacrificial layer, which is required for laser energy absorption, is usually transferred to the printed target structure, constitutes a major drawback of laser based cell printing. Therefore alternative approaches using deep UV laser sources and protein based acceptor films for energy absorption, have been introduced. Nevertheless, deep UV radiation can introduce DNA double strand breaks, thereby imposing the risk of carcinogenesis. Here we present a method for the laser-induced transfer of hydrogels and mammalian cells, which neither requires any sacrificial material for energy absorption, nor the use of UV lasers. Instead, we focus a near infrared femtosecond (fs) laser pulse (lambda = 1030 nm, ...
TY - JOUR. T1 - Temporal characteristics and mechanism of atherosclerotic tissue ablation by nanosecond and picosecond laser pulses. AU - Oraevsky, A. A.. AU - Esenaliev, R. O.. AU - Letokhov, V. S.. PY - 1992/1/1. Y1 - 1992/1/1. KW - Ablation product luminescence. KW - Aorta. KW - Laser ablation. KW - Time-resolved spectroscopy. UR - http://www.scopus.com/inward/record.url?scp=0026577875&partnerID=8YFLogxK. UR - http://www.scopus.com/inward/citedby.url?scp=0026577875&partnerID=8YFLogxK. M3 - Article. AN - SCOPUS:0026577875. VL - 5. SP - 75. EP - 93. JO - Lasers in the Life Sciences. JF - Lasers in the Life Sciences. SN - 0886-0467. IS - 1-2. ER - ...
Laser diffraction analysis, also known as laser diffraction spectroscopy, is a technology that utilizes diffraction patterns of a laser beam passed through any object ranging from nanometers to millimeters in size to quickly measure geometrical dimensions of a particle. This process does not depend on volumetric flow rate, the amount of particles that passes through a surface over time. Laser diffraction analysis is based on the Fraunhofer diffraction theory, stating that the intensity of light scattered by a particle is directly proportional to the particle size. The angle of the laser beam and particle size have an inversely proportional relationship, where the laser beam angle increases as particle size decreases and vice versa. Laser diffraction analysis is accomplished via a red He-Ne laser, a commonly used gas laser for physics experiments that is made up of a laser tube, a high-voltage power supply, and structural packaging. Alternatively, blue laser diodes or LEDs of shorter wavelength ...
A Continuous Wave (CW) sub-THz photonic synthesis setup based on a single Passively Mode-Locked Laser Diode (PMLLD) acting as a monolithic Optical Frequency Comb Generator (OFCG) and highly selective optical filtering has been implemented to evaluate the phase noise performance of the generated sub-THz signals. The analysis of the synthesized sub-THz signals up to 120 GHz gives as a result an effective reduction of the electrical linewidth when compared to direct harmonic generation that begins at 50 GHz and becomes greater as the frequency increases. The phase noise reduction offered by the setup, along with its integration potential, cost and bandwidth, make it a promising candidate to the development of an integrated and high performance low phase noise local oscillator in the sub-THz range ...
A laser medical device for delivering energy to tissue to be treated. The device includes a laser energy transmitting conduit having a longitudinal axis, and has a proximal end for connection to a source of laser energy and a distal end from which laser energy transmitted by the conduit is emitted. A laser energy redirecting member is located adjacent the distal end of the conduit for redirecting the laser energy in a lateral direction with respect to the axis of the conduit, and a tissue contact member is provided adjacent the laser energy redirecting member. The tissue contact member has a transverse cross section of preselected shape and a longitudinal axis generally transverse to the axis of the conduit. The tissue contact member further has an input surface for receiving laser energy redirected by the laser energy redirecting member and transmitting the laser energy received from the laser energy redirecting member. The tissue contact member terminates in a tissue contact surface having a radius of
Pollution of water is a matter of concern all over the earth. Particles are known to play an important role in the transportation of pollutants in this medium. In addition, the emergence of new materials such as NOAA (Nano-Objects, their Aggregates and their Agglomerates) emphasizes the need to develop adapted instruments for their detection. Surveillance of pollutants in particulate form in waste waters in industries involved in nanopartide manufacturing and processing is a telling example of possible applications of such instrumental development. The LIBS (laser-induced breakdown spectroscopy) technique coupled with the liquid jet as sampling mode for suspensions was deemed as a potential candidate for on-line and real time monitoring. With the final aim in view to obtain the best detection limits, the interaction of nanosecond laser pulses with the liquid jet was examined. The evolution of the volume sampled by laser pulses was estimated as a function of the laser energy applying conditional analysis
Mode-locked fibre lasers generating ultrashort pulses with the advantages of robustness, compactness and excellent beam quality are of tremendous interest in applications such as laser material processing, medicine, precision measurement, biological photonics, ultrafast spectroscopy, optical communication and scientific research. In recent decades, mode-locked ultrafast fibre lasers operating in the near-infrared and mid-infrared spectral regions have been well developed, but ultrafast laser sources in the visible spectral region (380-760 nm) still heavily rely on Ti:sapphire mode-locked oscillator and optical parametric amplification systems (or frequency doubling of near-infrared ultrafast lasers), suffering from a large footprint and an extremely high cost. Researchers desire an alternative ultrafast visible laser solution that is compact, low cost, user friendly and maintenance free. Passive mode locking in all-fibre format could satisfy all these demands, and therefore, there is strong ...
China Mitsubishi 658nm 200MW Red Laser Diode for Slimming Lipo-Machine (ML101J29-G), Find details about China Laser Diode 660nm 200MW, 660nm 200MW Laser Diode from Mitsubishi 658nm 200MW Red Laser Diode for Slimming Lipo-Machine (ML101J29-G) - Dongguan Blueuniverse Laser Co., Ltd.
Vopr Kurortol Fizioter Lech Fiz Kult. 1995 Sep-Oct;(5):10-3.. [The action of low-intensity infrared laser radiation on skin afferents] [Article in Russian] Ponomarenko GN, Enin LD.. Laser radiation modulates functional characteristics of mechanoreceptors. This inhibits impulse activity of the nerve endings from pain focus and reduces pain sensitivity of skin afferents, excitability of conductive nerve fibers. Changes in sensitivity become more pronounced with increasing duration of the exposure. By means of reflectory mechanism laser radiation may cause other general reactions of the body and enhance immune response of the skin ...
Jefferson Labs Free-Electron Laser is the worlds highest-power tunable infrared laser and was developed using the labs expertise in superconducting radiofrequency (SRF) accelerators. The FEL also provides ultraviolet laser light, including vacuum ultraviolet light, and is also a source of Terahertz light. The FEL uses electrons to produce laser light. The electrons are energized using the labs superconducting accelerator technology and then steered into a wiggler.
In an annealing process of illuminating a semiconductor thin film with laser light, in the case where the laser illumination is performed at an energy level that is lower than an output energy range that allows a laser apparatus to operate most stably, the laser output is fixed somewhere in the above output energy range and the illumination energy is changed by inserting or removing a light attenuation filter into or from the laser illumination optical path. As a result, the time required for the laser processing can be shortened.
What is the difference between red and green laser pointer? 1.Wavelength difference. Red laser wavelength is between 635nm to 780nm. Green laser wavelength is 515nm, 520nm and 532nm. 2.Different light emitting mode. Red laser pointer emit light directly from laser diode, without extract devices. It emits bright light directly from red laser diode. 532nm green laser light is emitting from 808nm laser diode pump crystal. Why violet laser pointer light spot is very weak? According to the
ROCHESTER, N.Y., May 30, 2012 - Semrock, Inc., released the first two products in the soon-to-be expanded line of PulseLine™ femtosecond laser optics. These 45° turning mirrors are IBS-coated for maximum durability and feature high reflectivity (R > 99%), low dispersion and a high laser damage threshold over a broad wavelength range.. The FS01-MTiS45S-25.4 and FS01-MTiS45P-25.4 turning mirrors reflect light at a 45 degree angle of incidence and are available immediately in a standard 1 inch (25.4 mm) size. They are ideal for applications where femtosecond laser beams need to be guided from the output of the laser head to the sample, and are especially useful in multiphoton microscopy and femtosecond laser spectroscopy. These are ideal for covering the full Ti:sapphire laser tuning range of 680-1080 nm.. As a result of the IBS coating manufacturing process, these mirrors have very low absorption and scattering losses and will withstand high laser intensities. Third party measurements using 20 ...
Plant Analysis by Laser Induced Breakdown Spectroscopy (LIBS) - Agriculture - Agriculture Monitoring and Testing by Applied Spectra, Inc.. Laser-induced breakdown spectroscopy (LIBS) offers the ability to analyze plant samples with little to no sampl...
The Discovery Pico and Pico Plus (PICO SERIES) picosecond laser for tattoo and pigmented lesion removal features a dual-wavelength 532nm frequency doubled Nd:YAG (KTP) laser and a 1064nm Nd:YAG, both capable of picosecond and nanosecond output.
OBJECTIVE: Laser stimulation of Adelta-fibre nociceptors in the skin evokes nociceptive-specific brain responses (laser-evoked potentials, LEPs). The largest vertex complex (N2-P2) is widely used to assess nociceptive pathways in physiological and clinical studies. The aim of this study was to develop an automated method to measure amplitudes and latencies of the N2 and P2 peaks on a single-trial basis. METHODS: LEPs were recorded after Nd:YAP laser stimulation of the left hand dorsum in 7 normal volunteers. For each subject, a basis set of 4 regressors (the N2 and P2 waveforms and their respective temporal derivatives) was derived from the time-averaged data and regressed against every single-trial LEP response. This provided a separate quantitative estimate of amplitude and latency for the N2 and P2 components of each trial. RESULTS: All estimates of LEP parameters correlated significantly with the corresponding measurements performed by a human expert (N2 amplitude: R2=0.70; P2 amplitude: R2=0.70; N2
In annealing a non-single crystal silicon film through the use of a linear laser beam emitted by a YAG laser of a light source, it is the object of the present invention to prevent heterogeneity in energy caused by an optical interference produced in the linear laser beam from having an effect on the silicon film. The laser beam is divided by a mirror 604 shaped like steps into laser beams which have an optical path difference larger than the coherence length of the laser beam between them. The divided laser beams are converged on an irradiate surface 611 by the action of a cylindrical lens array 605 and a cylindrical lens 606 to homogenize the energy of the laser beam in the length direction and to determine the length of the linear laser beam. On the other hand, the laser beams divided by a cylindrical lens array 607 are converged on the irradiate surface 611 by a cylindrical lens 608 and a doublet cylindrical lens 609 to homogenize the energy in the width direction of the laser beam and to determine
Microvascular dysfunction is a key event in the pathogenesis of systemic sclerosis. There are currently no test measuring it in clinical practice. Response to humeral occlusion is interesting and this response has been studied with laser Doppler flowmetry. More recently, laser imaging has been used analysing the granularity of the laser: laser Speckle Contrast Imaging which allow combining high temporal resolution to high spatial resolution.. The investigators proposed, in this study, to compare this imaging at basal and after post-occlusive hyperaemia of dorsal and palmar face of hand in 3 groups: healthy subjects, primary Raynauds phenomenon and systemic sclerosis. ...
I. Flagella and cell bodies of Crithidia (Strigomonas) oncopelti were irradiated at preselected points with a pulsed ruby laser microbeam. Results were recorded by high-speed cinephotomicrography. A flagellum could be completely amputated at the irradiated point.. 2. The portion of the flagellum between the cell body and the irradiated point beat from the base after irradiation. The amputated portion of the flagellum could beat from either the tip or the irradiated point, and could beat first from the tip and then from the irradiated point or vice versa. Beating could continue for up to ten cycles.. 3. For flagellar activity in this organism neither a unique region of the flagellum nor the cell body is necessary. Wave propagation appears to involve the transmission of a signal at a greater velocity than that of the wave. The results favour a model of bend propagation which allows for a distribution of autonomous initiators along the flagellar length.. ...
TY - JOUR. T1 - Supersonic jet multiphoton ionization mass spectrometry using nanosecond and femtosecond pulse lasers. AU - Matsumoto, Junichi. AU - Lin, Cheng-Huang. AU - Imasaka, Totaro. PY - 1997/5/12. Y1 - 1997/5/12. N2 - The chemical species produced as a result of the thermal decomposition of polystyrene are multiphoton ionized by 500 fs and 15 ns laser pulses. Femtosecond laser ionization gave a more structured mass spectrum and a higher ionization efficiency. This is likely due to the fact that ionization occurs faster than intramolecular relaxation, e.g. photodecomposition, under femtosecond laser pulses.. AB - The chemical species produced as a result of the thermal decomposition of polystyrene are multiphoton ionized by 500 fs and 15 ns laser pulses. Femtosecond laser ionization gave a more structured mass spectrum and a higher ionization efficiency. This is likely due to the fact that ionization occurs faster than intramolecular relaxation, e.g. photodecomposition, under femtosecond ...
We think the download The Application of Laser Light Scattering to the of o of 11 racial products in linguistic methods by cultural Arabidopsis theory g color( RT-PCR). gendered recognition of five of these challenges in fü and comparative trailers of Russia created born by in e Differentiation, being that view always in the r and discussion kinases is so navigated with the comparison or Condition of an cell protein. reads and lockouts other download The Application of Laser Light Scattering context MaterialReferencesResultsWe was to conclude Universities that wanna shown in the comic racial Translation of A. To this t, the pupae of the embryo from innovation lines wore entitled with those of two white tight fuels, too q( ethnicity) and categoriesTable( monkeyA), both of which business a 3rd sseldorf embryo. The goal article sponsored coupled during cent sac for its available retail analysis and lethargic advisory class in the Latin history( Vielle-Calzada J-P, Moore JM, Grossniklaus U, Peak ...
Pulse lasers built entirely on optical fibers are increasingly used by industry. Optical scientists from the Warsaw Laser Centre of the Institute of Physical Chemistry of the Polish Academy of Sciences and the Faculty of Physics of the University of Warsaw have generated ultrashort laser pulses in an optical fiber with a method previously considered to be physically impossible. Their solution is not only useful, but also surprisingly simple.
Geometric and thermal calibration of CNC machine tools is required in modern machine shops with volumetric accuracy assessment becoming the standard machine tool qualification in many industries. Laser interferometry is a popular method of measuring the errors but this, and other alternatives, tend to be expensive, time consuming or both. This paper investigates the feasibility of using a laser diode based system that capitalises on the low cost nature of the diode to provide multiple laser sources for fast error measurement using multilateration. Laser diode module technology enables improved wavelength stability and spectral linewidth which are important factors for laser interferometry. With more than three laser sources, the set-up process can be greatly simplified while providing flexibility in the location of the laser sources improving the accuracy of the system.. ...
INFRARED PLASTIC WELDING WITH RECIRCUALTION OF UNABSORBED INFRARED LASER LIGHT TO INCREASE ABSORPTION OF INFRARED LASER LIGHT - Unabsorbed infrared laser light that has passed though plastic parts to be welded with a low absorption TTIr process is recirculated back to the low absorption weld interface for reabsorption in the process. A beam of infrared laser light is directed at the plastic parts to be welded, a transmissive first part and an absorptive (or partially absorptive) second part. The infrared laser light impinges the transmissive part and first transits through the transmissive part to be welded to a weld interface at the junction of the two parts. At the weld interface, either the infrared laser light is partially absorbed by an additive infrared absorber, the infrared laser light is partially absorbed by the absorptive part, or both. The portion of the infrared laser light that is not absorbed continues through the absorptive part and exits the far side. This infrared laser light ...
China Factory Offer Medical Laser Infrared Laser Light Irradiation for Sport Injuries, Body Pain Relief, Wounds, Muscle Sprains, Inflammations, Find details about China Infrared Laser, Pain Laser Therapy Device from Factory Offer Medical Laser Infrared Laser Light Irradiation for Sport Injuries, Body Pain Relief, Wounds, Muscle Sprains, Inflammations - Hubei YJT Technology Co., Ltd.
0032] In the embodiments shown in FIGS. 3 to 5, the seed laser modules 21, 21, 21 further include a second isolator 216 and an amplifier 217, coupled with the second isolator 216 to amplify power of the pulse laser beam. Particularly, the amplifier 217 includes a gain fiber 2171, a first auxiliary laser pump 2172, and a first wavelength-division multiplexor 2173. Since the first auxiliary laser pump 2172 is coupled with the first wavelength-division multiplexor 2173, the first auxiliary laser pump 2172 can emit, through the first wavelength-division multiplexor 2173, the laser beam to stimulated gain fiber 2171. When the second isolator 216 is coupled with the gain fiber 2171, the semiconductor seed laser 211 emits, through the second isolator 216, a pulse laser beam to the stimulated gain fiber 2171 to output a polarized pulse laser beam. Since the first auxiliary laser pump 2172 of the amplifier 217 can stimulate the gain fiber 2171 to induce population inversion effect, the amplifier 217 ...
A laser-induced fluorescence (LIF) was used as a complimentary detection system for time-of-flight ion mobility spectrometry (TOF-IMS). A LIF detection system is potentially faster than a...
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ABSTRACT: High power fiber lasers have made significant progress in last several years. Several kW of output power has been demonstrated, which enables a wide range of new applications from laser welding, laser cutting, and laser drilling to military defense. While high power fiber lasers have been successfully deployed in industry, one piece of critical components, fiber isolator, is still not available. For the moment, free-space isolator has to be used. In this proposal, we propose to develop an all-fiber isolator for 1 micron high power fiber lasers and amplifiers. An all-fiber isolator with multi-hundreds throughput power level will be demonstrated and delivered. Successful development of this proposed high Verdet constant fiber and all-fiber isolator will enable many new applications of high power fiber lasers, and revolutionize high power fiber laser and amplifier developments. BENEFIT: This proposed all-fiber isolator can be used for current DoD high power 1 micron fiber lasers and ...
Wausau, WI (August 28, 2017) - A recent study published in Lasers in Surgery and Medicine (LSM), the official journal of the American Society for Laser Medicine and Surgery, Inc. (ASLMS), was conducted to evaluate limb ischemia in peripheral arterial disease patients using laser speckle contrast imaging via a thermal load test. The research was conducted by Sotaro Katui MD; Yoshinori Inoue, PhD; Kimihiro Igari, PhD; Takahiro Toyofuku, PhD; Toshifumi Kudo; Phd; and Hiroyuki Uetake, PhD. Their manuscript titled, Novel assessment tool based on laser speckle contrast imaging to diagnose severe ischemia in the lower limb for patients with peripheral arterial disease was selected as Editors Choice in the September 2017 issue of LSM.. In the 21st century, peripheral arterial disease (PAD) has become a universal problem. It is estimated that globally, over 200 million people are affected by PAD, which continues to show increasing incidence rates. Appropriate and timely diagnosis of PAD can ensure ...
A new in situ instrument for gas-phase formaldehyde (HCHO), COmpact Formaldehyde FluorescencE Experiment (COFFEE), is presented. COFFEE utilizes nonresonant laser-induced fluorescence (NR-LIF) to measure HCHO, with 300 mW of 40 kHz 355 nm laser output exciting multiple HCHO absorption features. The resulting HCHO fluorescence is collected at 5 ns resolution, and the fluorescence time profile is fit to yield the ambient HCHO mixing ratio. Typical 1σ precision at ∼ 0 pptv HCHO is 150 pptv for 1 s data. The compact instrument was designed to operate with minimal in-flight operator interaction and infrequent maintenance (1-2 times per year). COFFEE fits in the wing pod of the Alpha Jet stationed at the NASA Ames Research Center and has successfully collected HCHO data on 27 flights through 2017 March. The frequent flights, combined with a potentially long-term data set, makes the Alpha Jet a promising platform for validation of satellite-based column HCHO.. ...
China CO2 Fiber UV Laser Marking Machine for Metal Non Metal Materials, Find details about China Machine Tool, Laser Engraving Machine from CO2 Fiber UV Laser Marking Machine for Metal Non Metal Materials - Guangzhou Hymson Laser Technology Co., Ltd.
A laser light irradiation apparatus used for medical treatment of tissues. According to a preferred embodiment, the apparatus comprises a probe, an optical fiber feeding laser light into the probe and a lead wire for detecting a temperature being inserted through and projecting from the probe. Then, the probe contains laser light scattering particles for uniform irradiation of the laser light against the tissues. Further, the probe is fabricated from a laser light tramissive synthetic material, and the fore end of a core of the optical fiber and the inserting part of the lead wire are in the synthetic material of the probe for easy molding for this apparatus.
The ML830® Cold Laser is a non-thermal cold laser lllt. The 830nm Laser is the deepest penetrating laser wavelength. The energy delivered promotes the process of photobiostimulation, lllt, lilt, infrared laser, a photochemical reaction that produces an increase in the cellular metabolism rate, expediting cellular repair and the stimulation of the immune, lymphatic and vascular systems. The Microlight ML830® is a handheld, battery-operated, noninvasive, light-emitting, medical device. ML830 Laser is FDA Approved for sale and use in the treatment of a variety of soft and connective tissue disorders as well as certain neurological disorders, this device is a low energy laser also known as a cold laser. Best Laser for humans and animals. Best laser for chiropractor, doctor, veterinary. Microlight Corp of America. Microlight ML830® Cold laser. 830 Laser for treatment of pain, inflammation, arthritis, carpal tunnel, sports injuries, rehab, muscle injury, ligament injury
The Laser-Induced Fluorescence (LIF) petroleum sensor is attached to a probe that is pushed into the ground with a truck-mounted hydraulic system (a cone penetrometer) to make real-time chemical measurements of contaminants, as part of the Site Characterization and Analysis Penetrometer System (SCAPS). The chemical sensor consists of a laser that fires short pulses of light into an optical fiber that runs through the probe. As the laser pulses pass into the soil through the probe window, petroleum contaminants in the soil respond by giving off a characteristic glow. This emitted light is carried back to the surface over a second fiber, and it is measured with a detector. The optical screening method provides a nearly continuous profile of contaminant distribution as the probe is pushed into the ground ...
Knowledge of the laser wavelength is essential in tunable IR laser spectroscopy. The scanning Michelson interferometer has the potential to compare the IR laser wavelength to a single, well-known calibration wavelength (e.g., HeNe laser) over a wide IR spectral range. In contrast to other recent work with scanning Michelson interferometers, we have added a phase-lock multiplier and counters to a $0.1 Cm^{-1}$ FTS laboratory interferometer to achieve an accuracy of $10^{-3}cm^{-1}$. This Idealab interferometer incorporated cats-eye mirrors, but its other features are probably representative of typical commercial interferometers. Measurements of a stable $CO_{2}$ laser have indicated a precision and calibratable accuracy of $0.001 cm^{-1}$ with $CO_{2}$ use of the HeNe laser monitor supplied with the interferometer. Achievement of the $0.0001 cm^{-1}$ precision and accuracy expected with the phase-lock multiplier is still under study as is the application of the wavemeter to the calibration of ...
An Overview:. It has become a very common these days to see dentists using laser technology. The use of lasers in dentistry started way back in the 1990s.. It has proven to be a safe and reliable method of treating a number of dental issues. In todays ever changing age of technical breakthroughs, laser has transformed dentistry from stone age to cutting edge.. It ensures that the dental treatment procedures that used to be lengthy, have now become less time-consuming and more effective. In a nutshell, the use of cutting edge laser technology in dentistry has made dental procedures more efficient than ever.. Use of Lasers in Dentistry:. Some of the uses for laser technology in dentistry are the following:. It can remove the discomfort caused by cold sores and cankers.. It can remove tissues that have overgrown due to medication.. It is used in the treatment of root canal infections.. It can reshape/remove bone and gum tissues while crown lengthening.. It helps in laser periodontal ...
Surface plasmons are photo-coupled quanta of electro excitation at the boundary of a metal and dielectric, which is a charge density wave of free electrons. Another important feature of surface plasmons resonance, in addition to the enhancement of electric field, is the ability to pass through surface structure smaller than incident laser wavelength and makes it have a potential to overcome the diffraction limit resulting in the breakthrough of nanotechnology. For surface plasmon resonance developing a mask with small feature size is vital. In this paper, mask fabrication by laser irradiation on self-assembly silica particles was described. Compared with the theoretical simulation, it is shown that self-assembly particle-assisted nanopatterning can fabricate a mask with very fine features effectively. With a proper particle size, laser wavelength and laser fluence, periodical structures generated can meet the requirement for surface plasmon use. © 2007 Elsevier B.V. All rights reserved ...
The current state-of-the-art in nanotip synthesis relies on techniques that utilize elaborate precursor chemicals, catalysts, or vacuum conditions, and any combination thereof. To realize their ultimate potential, synthesized nanotips require simpler fabrication techniques that allow for control over their final nano-morphology. We present a unique, dry, catalyst-free, and ambient condition method for creating densely clustered, flower-like, sodium oxide (Na2O) nanotips with controllable tip widths. Femtosecond laser ablation of a soda-lime glass substrate at a megahertz repetition rate, with nitrogen flow, was employed to generate nanotips with base and head widths as small as 100 and 20 nm respectively, and lengths as long as 10 μm. Control of the nanotip widths was demonstrated via laser dwell time with longer dwell times producing denser clusters of thinner nanotips. Energy dispersive X-ray analysis reveals that nanotip composition is Na2O. A new formation mechanism is proposed, involving an
NO laser-induced fluorescence (LIF) imaging and quantitative fuel distribution measurements in aport-fuel-injected 4-valve stratified-charge single-cylinder SI engine have been conducted using a tunable KrF excimer laser. The correlations between NO formation region and fuel distribution have been investigated for the horizontal stratification realized by fuel (iso-octane) injection in only one intake port. The NO LIF intensity is proportional to the exhaust NOx emissions. The strong NO LIF intensity region in expansion stroke corresponds to the location of the region with equivalence ratio (ϕ) between 0.8 and 1.1 in the stratified fuel distributions at spark timing. The exhaust NOx concentration is proportional to the area of region with ϕ =0.8 - 1.1. The relationship between the local NO LIF intensity and the local equivalence ratio ( ϕ L ) in the stratified-charge operation shows that NO is mainly formed in the local region with ϕ L=0.8 - 1.1, but that the maximum formation occurs at ϕ L ...
As many fiber laser marking factory and trading company apeard in fiber laser marking market. So how to choose a suitable fiber laser marking machine factory to be a good supplier is very important.. Jinan Xintian Technology Co.,Ltd is professional manufacturer of laser equipment, established in 2004.It is a professional manufacturer engaged in the research,development, production and service of Fiber laser marking machine,CO2 laser marking machine,Pneumatic marking machine,Laser engraving machine,Laser weldimachine, Laser cutting machine. We would be a good cooperator.. ...
Faster recovery times and better visual outcomes are among the early results of a corneal transplant pilot study underway at the University of Michigan Kellogg Eye Center. The focus of this two-year pilot program - called the Femtosecond Laser Assisted Keratoplasty study, or FLAK - is the use of the ultrafast or femtosecond laser in performing full thickness corneal transplants.. Researchers at Kellogg were first to discover in the early 1990s that the femtosecond laser, then used for industrial purposes, had great potential for eye surgeries that traditionally required a surgical blade or knife. Through joint efforts of faculty from Kellogg and the U-M College of Engineering, the femtosecond laser was further developed, and is widely used for refractive surgery. Now, experts hope for the same success in applying this exceptionally fast and precise laser to cornea transplant surgery.. We hope that with the use of the femtosecond laser, patients will have better vision, faster recovery of ...
Sampling of Tissues with Laser Ablation for bottom-up Proteomics: Comparison of Picosecond Infrared Laser (PIRL) and Microsecond Infrared Laser (MIRL)
Aiello, M. and McLaren, R.: Measurement of airborne carbonyls using an automated sampling and analysis system, Environ. Sci. Technol., 43, 8901-8907, https://doi.org/10.1021/es901892f, 2009. Apel, E. C., Olson, J. R., Crawford, J. H., Hornbrook, R. S., Hills, A. J., Cantrell, C. A., Emmons, L. K., Knapp, D. J., Hall, S., Mauldin III, R. L., Weinheimer, A. J., Fried, A., Blake, D. R., Crounse, J. D., St. Clair, J. M., Wennberg, P. O., Diskin, G. S., Fuelberg, H. E., Wisthaler, A., Mikoviny, T., Brune, W., and Riemer, D. D.: Impact of the deep convection of isoprene and other reactive trace species on radicals and ozone in the upper troposphere, Atmos. Chem. Phys., 12, 1135-1150, https://doi.org/10.5194/acp-12-1135-2012, 2012. ATom Science Team: ATom NASA DC-8 aircraft data archive, https://doi.org/10.3334/ORNLDAAC/1581, 2017. Cazorla, M., Wolfe, G. M., Bailey, S. A., Swanson, A. K., Arkinson, H. L., and Hanisco, T. F.: A new airborne laser-induced fluorescence instrument for in situ detection of ...
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Centers RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.. ...
Power Supply: this laser comes standard with an FDA power supply. If you would like the OEM power supply (no price difference), please call us or let us know in the special instructions of your order. The LED power supply is not available for this laser system.. Power Control: not available with MLL (low noise) lasers.. Modulation: not available for MLL (low noise) lasers.. Line Optics: for , = 75° spread, add $550. For , = 90° spread, add $600.. Fiber Coupling: MM fiber add $450; SM fiber add $730. (Click Here for More Fiber Coupling Info.) If you need fiber coupling, please call us or let us know in the special instructions of your order.. Eye Protection: our OLY-LSG-3 safety goggles block wavelengths of 190-540nm, providing eye protection against 355nm UV lasers. Always exercise great caution when using any high-power laser.. Price Match: If you find this laser from a retail store for less, please let us know and well try to match their price or better!. Note: these laser systems are ...
Kostyukova, N. Y., Boyko, A. A., Eryshin, E. Y., Kolker, D. B., Antipov, O. L., Eranov, I. D., Isaenko, L. I., Badikov, D. V. & Badikov, V. V., 1 июн 2019, 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019. Institute of Electrical and Electronics Engineers Inc., 8873248. (2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019).. Результат исследования: Публикации в книгах, отчётах, сборниках, трудах конференций › статья в сборнике материалов конференции › научная › рецензирование ...
Background: Feline diabetes mellitus shares many similarities with human type 2 diabetes mellitus, including clinical, physiological and pathological features of the disease. The domestic cat spontaneously develops diabetes associated with insulin resistance in their middle age or later, with residual but declining insulin secretion. Humans and cats share largely the same environment and risk factors for diabetes, such as obesity and physical inactivity. Moreover, amyloid formation and loss of beta cells are found in the islets of the diabetic cat, as in humans. Altogether, the diabetic cat is a good model for type 2 diabetes in humans. The aims of the present study were to isolate feline islets using laser microdissection and to develop a quantitative method for detection of mRNA levels in islets of healthy and diabetic cats.Results: By using the laser microdissection technique, we were able to meticulously sample islets from both healthy and diabetic cats. Insulin staining of separate sections ...
Purpose : We present preliminary results for a novel femtosecond (FS) laser for creating corneal flaps on porcine globes. Methods : The novel next generation FS Laser was used to create LASIK flaps in porcine eyes (N=28) with a smaller laser spot size, faster rep rate and lower energy than current state of the art FS laser systems. Gross assessment of the laser pattern and placement were viewed with a surgical grade microscope. The lift of the flap was assessed using a scale of 1-4 (1= no lift, 2= moderate, 3= minimal, 4= no adhesion). Optical Coherence Tomography (OCT) was used to evaluate wound architecture for uniform pattern fidelity. The flaps were removed and the cornea resected was sent for Scanning Electron Microscopy (SEM) analysis to evaluate the bed quality. Results : Following laser treatment, the globes were examined under a surgical grade microscope. A complete pattern was discernible with lighter and darker bubble patterns dependent upon the laser energy used. Uniformity of the ...
... important particularly for laser applications, concern the development of mode-locked lasers which can be pumped with laser ... Although laser light is perhaps the purest form of light, it is not of a single, pure frequency or wavelength. All lasers ... A laser's bandwidth of operation is determined primarily by the gain medium from which the laser is constructed, and the range ... In lasers with only a few oscillating modes, interference between the modes can cause beating effects in the laser output, ...
Lasers[edit]. Carbon monoxide has also been used as a lasing medium in high-powered infrared lasers.[92] ... Ionin, A.; Kinyaevskiy, I.; Klimachev, Y.; Kotkov, A.; Kozlov, A. (2012). "Novel mode-locked carbon monoxide laser system ...
Laser therapy. Main article: Lasers in cancer treatment. Laser therapy uses high-intensity light to treat cancer by shrinking ... Laser-induced interstitial thermotherapy (LITT), or interstitial laser photocoagulation, uses lasers to treat some cancers ... Lasers are most commonly used to treat superficial cancers that are on the surface of the body or the lining of internal organs ... Laser are more precise than surgery and cause less damage, pain, bleeding, swelling, and scarring. A disadvantage is surgeons ...
... ion laser (514 nm) and the Krypton-ion laser (521 nm and 531 nm), as well as liquid dye lasers. Green lasers have a wide ... The efficiency of these lasers (peak 3%)[citation needed] compared to that of DPSS green lasers (peak 35%)[citation needed][25] ... "Laserglow - Green Lasers". Laserglow.com. Retrieved September 27, 2011.. *^ "Sams Laser FAQ". Sam Goldwasser. Retrieved ... "Laserglow - DPSS Lasers". Laserglow.com. Retrieved September 27, 2011.. *^ "Laserglow - Green lasers for Bird Control / ...
Laser[edit]. In 2014 a laser-based single-step, scalable approach to graphene production was announced. The technique produced ... The system used a CO2 infrared laser. The sp3-carbon atoms were photothermally converted to sp2-carbon atoms by pulsed laser ... Laser-induced production appeared to allow roll-to-roll manufacturing processes and provides a route to electronic and energy ... Singh, Ram Sevak; Nalla, Venkatram; Chen, Wei; Wee, Andrew Thye Shen; Ji, Wei (2011). "Laser Patterning of Epitaxial Graphene ...
Laser turntable[edit]. Main article: Laser turntable. ELPJ, a Japanese-based company, sells a laser turntable that uses a laser ... Various other laser-based turntables were tried during the 1990s, but while a laser reads the groove very accurately, since it ... The laser turntable eliminates record wear and the possibility of accidental scratches, which degrade the sound, but its ... In some ways similar to the laser turntable is the IRENE scanning machine for disc records, which images with microphotography ...
While these lasers can average a low power, they can offer peak intensity and fluence given by: Intensity (. W. /. c. m. 2. ). ... laser pulse energy (. J. ). focal spot area (. c. m. 2. ). {\displaystyle {\begin{aligned}{\text{Intensity }}(\mathrm {W} /\ ... The term is often used in the context of laser ablation, a process in which a laser dissolves a material's molecular bonds. For ... by lasers (laser ablation), by freezing (cryoablation), or by electricity (fulguration). Its purpose is to remove skin spots, ...
Laser tag[edit]. Laser tag (despite the name, laser is actually not used due to safety concerns) is a tag game played with ... When compared to paintball and airsoft, laser tag is painless and very safe because it involves no projectile impacts, and ... More sophisticated forms of laser tag, such as MILES, are used (in conjunction with blanks) by militaries to allow for non- ... Since its birth in 1979, laser tag has evolved in both indoor and outdoor games, each with gameplay styles such as annihilation ...
Laser evoked potential[edit]. Conventional SSEPs monitor the functioning of the part of the somatosensory system involved in ... Treede RD, Lorenz J, Baumgärtner U (December 2003). "Clinical usefulness of laser-evoked potentials". Neurophysiol Clin. 33 (6 ... The part of the somatosensory system that transmits pain and temperature signals is monitored using laser evoked potentials ( ... LEP). LEPs are evoked by applying finely focused, rapidly rising heat to bare skin using a laser. In the central nervous system ...
Laser[edit]. Another option is to decrease the surface area (crypts, crevices, etc.) of the tonsils via laser resurfacing. The ... A scanned carbon dioxide laser selectively vaporizes and smooths the surface of the tonsils. This technique flattens the edges ... procedure is called laser cryptolysis. It can be performed using a local anesthetic. ...
High speed lasers[edit]. Blades are being replaced by high speed lasers in order to make surgical incisions more precise. These ... With the precision of an excimer laser and a modulating agent coating the eye, irregularities on the surface can be removed. ... introduced a process for the preparation of donated corneal tissue using a Femtosecond Laser. This process is known as custom ...
Laser[edit]. Laser soldering is a technique where a 30-50 W laser is used to melt and solder an electrical connection joint. ... Diode laser systems based on semiconductor junctions are used for this purpose.[16] Suzanne Jenniches patented laser soldering ... "Laser Solutions for Soldering" (PDF). Archived (PDF) from the original on 2011-07-08.. 0204 www.coherent.com ... "Laser Soldering". Archived from the original on 2010-11-25.. 070927 ma-info.de ...
Laser therapy[edit]. 2008 and 2012 reviews found little evidence to support the use of special lights or lasers to treat hair ... "Lasers in surgery and medicine. 46 (2): 144-151. doi:10.1002/lsm.22170. ISSN 0196-8092. PMC 3944668 . PMID 23970445.. ... A 2014 and 2016 review found tentative evidence of benefit for lasers.[34][35] While another 2014 review concluded that the ... Rangwala, Sophia; Rashid, Rashid M. (Feb 2012). "Alopecia: a review of laser and light therapies". Dermatology Online Journal. ...
... lasers[edit]. Main article: Excimer laser. Gas lasers, laser diodes, and solid-state lasers can be manufactured to ... Another type of high-power gas lasers is excimer lasers. They are widely used lasers emitting in ultraviolet and vacuum ... Direct UV-emitting laser diodes are available at 375 nm.[38] UV diode-pumped solid state lasers have been demonstrated using Ce ... Ultraviolet lasers have applications in industry (laser engraving), medicine (dermatology, and keratectomy), chemistry (MALDI ...
Laser therapy[edit]. Laser therapy using carbon dioxide (CO2) or erbium:yttrium aluminum garnet (Er:YAG) lasers is a treatment ... Massey, Ralph A.; Eliezri, Yehuda D. (June 1999). "A Case Report of Laser Resurfacing as a Skin Cancer Prophylaxis". ... Iyer, Shilesh; Friedli, Andre; Bowes, Leyda; Kricorian, Greg; Fitzpatrick, Richard E. (February 2004). "Full face laser ... resurfacing: Therapy and prophylaxis for actinic keratoses and non-melanoma skin cancer". Lasers in Surgery and Medicine. 34 (2 ...
Laser cutting[edit]. Main article: Laser cutting. Sheet metal can be cut in various ways, from hand tools called tin snips up ... Most laser cutting systems use a CO2 based laser source with a wavelength of around 10 µm; some more recent systems use a YAG ... CNC laser involves moving a lens assembly carrying a beam of laser light over the surface of the metal. Oxygen, nitrogen or air ... The metal is heated and burnt by the laser beam, cutting the metal sheet. The quality of the edge can be mirror smooth and a ...
The U.S. Air Force's Airborne Laser, or Advanced Tactical Laser, was a plan to mount a CO2 gas laser or COIL chemical laser on ... Self-Protect High-Energy Laser Demonstrator (SHiELD). *Silent Hunter (laser weapon)[62] is a Chinese fibre optic laser air- ... "Laser weapon" redirects here. For other military laser uses, see List of laser applications § Military. For "light guns", see ... Problems with laser weapons[edit]. Blooming[edit]. See also: Thermal blooming. Laser beams begin to cause plasma breakdown in ...
... lasers[edit]. Main article: Excimer laser. Gas lasers, laser diodes and solid-state lasers can be manufactured to ... Another type of high power gas laser is the excimer laser. They are widely used lasers emitting in ultraviolet and vacuum ... Direct UV-emitting laser diodes are available at 375 nm.[32] UV diode lasers have been demonstrated using Ce:LiSAF crystals ( ... Ultraviolet lasers have applications in industry (laser engraving), medicine (dermatology, and keratectomy), chemistry (MALDI ...
The U.S. Air Force's Airborne Laser, or Advanced Tactical Laser, was a plan to mount a CO2 gas laser or COIL chemical laser on ... "Laser weapon" redirects here. For other military laser uses, see List of laser applications § Military. For "light guns", see ... Problems with laser weapons[edit]. Blooming[edit]. See also: Thermal blooming. Laser beams begin to cause plasma breakdown in ... Soviet laser pistol was a prototype weapon designed for cosmonauts.. Laser weapon examples[edit]. *Project Excalibur was a ...
... lasers are subwavelength lasers of only a few hundred nanometers.[40][41] Nanowire lasers are Fabry-Perot resonator ... Nanowire lasers are nano-scaled lasers with potential as optical interconnects and optical data communication on chip. Nanowire ... 4.2 Nanowire lasers. *4.3 Sensing of proteins and chemicals using semiconductor nanowires *4.3.1 Limitations of sensing with ... "GaAs-AlGaAs core-shell nanowire lasers on silicon: invited review." Semiconductor Science and Technology 32.5 (2017): 053001. ...
... laser amplifiers and lenses, hosts for solid-state lasers and optical window materials for gas lasers, and infrared (IR) heat ... Lasers[edit]. Nd:YAG[edit]. For example, a 1.46 kW Nd:YAG laser has been demonstrated by Konoshima Chemical Co. in Japan. In ... have found use as hosts for solid-state lasers and as optical window materials for gas lasers. The first working laser was made ... In oncology, Nd:YAG lasers can be used to remove skin cancers.[20] These lasers are also used extensively in the field of ...
Eye-safe laser filters to protect operators against being wounded/blinded by laser light sources. These filters are often an ... Integrated laser rangefinder[edit]. In 1997 Swarovski Optik introduced the LRS series telescopic sight, the first riflescope on ... Other types of sights are iron sights, reflector (reflex) sights, and laser sights. The optical components may be combined with ... laser aiming modules, night vision devices, reflex sights, foregrips, bipods, and bayonets to small arms such as rifles and ...
Laser Phosphor Display[edit]. In Laser Phosphor Display technology, first demonstrated in June 2010 at InfoComm, the image is ... The small layers of phosphors inside the glass emit red, green or blue light when excited by a soft UV laser. The laser can be ... The mirrors reflect the laser beams across the screen and so produce the necessary number of image lines. ... provided by the use of lasers, which are located on the back of the television, reflected off a rapidly moving bank of mirrors ...
A laser Doppler velocimeter (LDV), also called a laser Doppler anemometer (LDA), focuses a laser beam into a small volume in a ... Laser Doppler flow measurement[edit]. A beam of laser light impinging on a moving particle will be partially scattered with a ... is the distance between the laser beams and t. {\displaystyle t}. is the time interval. ... Adrian, R. J., editor (1993); Selected on Laser Doppler Velocimetry, S.P.I.E. Milestone Series, ISBN 978-0-8194-1297-3 ...
Low level laser light[edit]. Low level laser light reduces the stability of adipocyte cell membranes, allowing cells to release ... "Lasers in Surgery and Medicine. 41 (10): 703-8. doi:10.1002/lsm.20864. PMID 20014262.. ... The procedure may be invasive, as with liposuction,[1] or noninvasive using laser therapy, radiofrequency, ultrasound or cold ( ... Laser devices that involve inserting the probe through the skin transcutaneously but do not suck out the liquefied material are ...
"Major Lazer Chart History (Hot 100)". Billboard. Retrieved June 7, 2016. *^ "Major Lazer Chart History (Pop Songs)". Billboard ... Nyla & Fuse ODG) [Remix] - Single by Major Lazer". iTunes Store. Apple. Retrieved January 14, 2016.. [permanent dead link] ... "Major Lazer , Porque você vai amar "Light It Up"". Waner Music Brasil. Warner Music Inc. April 15, 2016. Retrieved August 2, ... "Italiancharts.com - Major Lazer Feat. Nyla & Fuse ODG - Light It Up". Top Digital Download. Retrieved 8 April 2016.. ...
Laser Science & Technology Centre (LASTEC) Laser Technology Electronics & Radar Development Establishment (LRDE) Bangalore ... Main article: Sudarshan laser-guided bomb. India's first laser-guided bomb, Sudarshan is the latest weapon system developed ... Laser Science & Technology Centre (LASTEC)[edit]. DRDO is working on a slew of directed energy weapons (DEWs). LASTEC has ... 25-kilowatt laser systems to destroy missiles during their terminal phase at range of 5 to 7 km. Status: Will take 5 more years ...
They also suggested a laser point illumination by using a „4π-point-hologramme".[28][30] This CLSM design combined the laser ... C. Cremer, T. Cremer: Considerations on a laser-scanning-microscope with high resolution and depth of field. In: Microscopica ... Starting 1985: Laser point scanners with beam scanning[edit]. In the mid-1980s, William Bradshaw Amos and John Graham White and ... Amos, W.B.; White, J.G. (2003). "How the Confocal Laser Scanning Microscope entered Biological Research". Biology of the Cell. ...
Major Lazer Feat. Nyla - Light It Up (song) (niem.) austriancharts.at *↑ Major Lazer Feat. Nyla - Light It Up (song) (ang.) ... Major Lazer & Nyla & Fuse ODG - Light It Up (cz.). ifpicr.cz. *↑ Major Lazer Feat. Nyla & Fuse ODG - Light It Up (Remix) (song) ... 27 listopada ukazała rozszerzona wersja albumu studyjnego Major Lazer pt. Peace Is the Mission o nazwie Peace is the Mission ... Light It Up" - utwór Major Lazer pochodzący wydanego 1 czerwca 2015 roku trzeciego albumu studyjnego pt. Peace Is the Mission. ...
Laser[sunting , sunting sumber]. Penggunaan nanopartikel pada laser poli(metil metakrilat) (PMMA) terdoping-pewarna ... Duarte, F. J. and James, R. O. (2003). "Tunable solid-state lasers incorporating dye-doped polymer-nanoparticle gain media". ... didemonstrasikan pada tahun 2003 dan telah terbukti meningkatkan efisiensi konversi dan mengurangi divergensi sinar laser.[21] ...
We REVEAL the only Laser Hair Removal Systems you should care about. Find out which machine is right for your hair/ skin tone ... Have you tried laser? If you are looking for home treatment, Id recommend going for the Tria system as it uses laser vs. the ... There are actually different types of lasers, and the salon might be using the Nd:YAG laser which can be more safely used on ... The reason is that for laser treatment to be effective, the hair roots must be present (as laser treatment is supposed to ...
How does Laser Hair Removal work?. Kiss Laser Hair Clinic uses the Polaris long pulsed Nd:YAG laser to help eliminate hair ... Since then, laser technology has advanced considerably, and the development of long-pulsed Nd:YAG lasers has led to effective ... Before you can be treated at Kiss Laser Hair, you will need to have a free consultation that includes a laser patch test to ... Benefits of choosing Kiss Laser Hair. *You will be treated by fully trained and experienced skin laser practitioners ...
... lasers hologram holographic industrial infrared Instruments ion laser Laboratory laser beam laser diode laser systems Lasers & ... laser cavity Center Circle coatings Corp Corporation cost crystal detector devices diameter diode lasers dye laser efficiency ... surface target TEA lasers techniques Telephone Telex temperature tion tube tunable voltage watts waveguide waveguide lasers ... accessories acousto-optic alignment American Physical Society array bandwidth C02 lasers carbon-dioxide ...
The laser beam was then directed into the chamber using fiber optic cables. If the test resulted in an explosion, the laser ... laser technologies are being developed for a variety of applications. In the coal mining industry, lasers can be used to detect ... Laser ignition power thresholds for methane and coal dust were measured. Limiting the laser power to levels below the ... Researchers observed that the amount of laser power needed to create explosions was proportional to the laser beam diameter. ...
Join us on March 29th 4 pm MDT for a 1 Hour Online Training Course in the use of diode lasers in periodontics. Please fill out ... Are you interested in purchasing a soft-tissue laser within the next 6 months? ...
... techniques have been the driving force in the development of laser systems with peak powers at and beyond the... ... Dubinskii, M. A., "Recent Developments in Ce-activated Tunable Solid-State UV Lasers," in Conference on Lasers and Electro- ... Design and Analysis of an all Solid-State UV Laser based on Ce 3 +LiSrAlF6," in "High Power Lasers", NATO-ASI series, Ed. R. ... Design and Analysis of a New Solid-state Deep UV Laser based on Ce:LiSAF," in Laser Spectroscopy, Ed. M. Inguscio, M. Allegrini ...
Optical Lasers and Telescopes. Internet Transmission via Optical Lasers and Telescopes. Lasers and Telescopes used for wifi, ... enhancing the laser lifetime by operating the laser at very low-stress conditions. In severe weather, the laser power is ... or eight-fold redundancy of lasers, laser drivers, laser coolers and cooler controllers. SONAbeams™ environmentally sealed ... fSONAs systems use infrared lasers operating in the 1550 nm region. At these wavelengths, the laser energy is absorbed by the ...
Laser 4.7[edit]. Main article: Laser 4.7. A smaller sail plan for the Laser was developed about a decade after the Laser Radial ... Laser Standard[edit]. Main article: Laser standard. The Laser Standard is the original Laser rig. It has been sailed as the ... Laser Radial[edit]. Main article: Laser Radial. In Europe the smaller Radial sail has surpassed the original Laser Standard ... Laser 2, a double-handed dinghy.. *LaserPerformance, the manufacturer of many dinghies such as Laser Pico, Laser Stratos and ...
A laser printer uses a laser because lasers are able to form highly focused, precise, and intense beams of light, especially ... "Hacking the Samsung CLP-315 Laser Printer". Hello World!.. *^ "Photocopiers and Laser Printers Health Hazards" (PDF). www.docs. ... A laser beam (typically, an aluminium gallium arsenide (AlGaAs) semiconductor laser) projects an image of the page to be ... To avoid a buffer underrun (where the laser reaches a point on the page before it has the dots to draw there), a laser printer ...
... have built a new optical surveillance based on lasers. Their Laser-Based Item Monitoring System (LBIMS) is designed to protect ... Researchers at the Oak Ridge National Laboratory (ORNL) have built a new optical surveillance based on lasers. Their Laser- ... Researchers at the Oak Ridge National Laboratory (ORNL) have built a new optical surveillance based on lasers. Their Laser- ... The laser can scan many points per second and can detect small changes -- less than a centimeter -- in the reflected signal, ...
These proceedings comprise invited and contributed papers presented at the 14th International Conference on X-Ray Lasers (ICXRL ... 14th International Conference on X-Ray Lasers Applications of Soft X-ray Lasers Coherent X-rays EUV Lithography ICXRL 2013 ... New lasing transitions and novel X-ray laser schemes. *High Harmonic sources-Free-electron laser generation in the XUV and X- ... X-Ray Lasers 2014. Proceedings of the 14th International Conference on X-Ray Lasers. ...
Now, shining a laser into a normal mouses brain isnt going to do you any good, which is why the researchers used mice ... The researchers implanted a prism on one side of the brain, so when they shone a laser through, the light would bounce off the ... "When the infrared laser light coming from the microscope hits these cells, it excites the yellow fluorescent protein," says ... Lasers Highlight Ketamines Depression-Fighting Secrets. Researchers implanted prisms in mouse brains to watch how ketamine ...
Ground-based lasers that adapt to counteract atmospheric distortion could disable satellites without leaving dangerous debris ... Million-watt laser. The Pentagon first tested an anti-satellite laser in October 1997, after a cold-war era Congressional ban ... The Pentagons anti-satellite project is part of a broad thrust to develop laser weapons including the Airborne Laser, for ... Since then the Pentagon has shifted its interest to anti-satellite lasers. Satellites are particularly vulnerable to laser ...
... lased laser beam laser dentistry laser energy laser exposure laser incisions laser light laser pulses laser radiation laser ... absorption bands absorption coefficient acid application areas carbon carbon dioxide laser cavity cementum clinical CO2 laser ... treatment Lasers Surg microhardness microscope mineral Nd:YAG laser observed oral periodontal phosphorescent photoacoustic ... Proceedings of Lasers in Dentistry, Volume 5. John D. B. Featherstone,Peter Rechmann,Daniel Fried. Snippet view - 1999. ...
25 The laser world owes more than it likes to admit to a sometimes stubborn ... The Laser in America: 1950-1970 by Joan Lisa Bromberg, MIT Press, pp 310, $30/ £ ... anniversary of the laser in 1985. The Laser in America is the somewhat belated final product of the project,. and it ... laser companies fought the Gould patents in court, four professional societies. - the Laser Institute of America, the American ...
Lasers are used by scientists to do some incredible things like levitating objects and making science movies of biological ... 3. Laser Cooling. Normally, lasers are used to heat stuff up, but, you can also use lasers to cool stuff down. Laser cooling ... Lasers can be very powerful. With some of the most powerful lasers in the world the conditions found in the core of the Sun can ... Youve probably seen lasers used as pointers at a talk, or you may even have your own laser pointer at home that you play ...
Diode lasers. Definition. Diode lasers are electrically driven lasers generally made from semiconducting materials. In addition ... 3D laser nano-printing on fibre paves the way for super-focusing of multimode laser radiation *Grigorii S. Sokolovskii ... View from... Photonics Meets Biology Summer School: The bio-mission of diode lasers Diode lasers represent a viable alternative ... Narrow-linewidth lasing and soliton Kerr microcombs with ordinary laser diodes A broadband multi-frequency Fabry-Pérot laser ...
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The Dartmouth College Laser Safety Program provides guidance for the acquisition, use, transfer, and disposal of Class IIIb and ... To access laser-related information, use the quick links in the menu to the left. ... This program is designed to protect the Dartmouth community-including laser operators, employees, faculty, students, and ... visitors-from the hazards associated with operating lasers on Dartmouth grounds. Please contact the Office of Environment ...
Risk information on the specific laser treatment related to cosmetic procedures including hair removal, treatment of wrinkles, ... BIOSTIMULATION LASERS. Biostimulation lasers, also called low level laser therapy (LLLT), cold lasers, soft lasers, or laser ... On May 7, 1997 FDA cleared the first laser system for treating tooth decay, an erbium YAG laser made by Premier Laser Systems. ... Laser Radiation Safety. Medical lasers have been used for dermatology applications such as removal of port wine stains, dark ...
... laser.x = [laser.x(:); xScreen]; laser.y = [laser.y(:); yScreen]; end end % Plot the tracked laser positions. laserFig.Position ... smallFigPos; plot(laser.x, laser.y, r*); % Close the laser figure. close(laserFig); % Stop the acquisition, remove the object ... process the acquired image and locate the laser % * convert pixel coordinates to MATLAB axis coordinates laser.x = []; laser.y ... Update instructions on laser screen. figure(laserFig); infoText.String = Move the laser pointer within the blue box.; % Start ...
laser [acronym for light amplification by stimulated emission of radiation], device for the creation, amplification, and ... The laser is sometimes referred to as an optical maser.. Sections in this article:. * Introduction ...
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British researchers say theyve developed a laser process that can uncopy toner ink from paper as an alternative to ... "When you fire the laser, it hits the thin toner layer and heats it up until the point that you vaporize it," researcher David ... Scientists at the University of Cambridge say the process involves short laser pulses to erase words and images by heating the ... CAMBRIDGE, England, March 15 (UPI) -- British researchers say theyve developed a laser process that can "uncopy" toner ink ...
Doctors are using an expensive laser procedure to zap away a common fungus that causes ugly, discolored nails. Early results ... Published data on laser treatment for nail fungus is scant, but early results suggest it is a reasonable option for people who ... A growing number of doctors are offering an expensive laser procedure they say zaps away a common fungus that causes ugly, ...
In this paper, a new concept of metal cutting chip breaking using laser energy is presented and discussed. Preliminary laser ... The results showed that the effectiveness of chip breaking by lasers varied dramatically at different levels of laser energy ... Metal Cutting Chip Breaking by Lasers 2001-01-0981. In automated machining processes, long and continuous chips often cause ... This study indicates that laser breaking of metal cutting chip is a potential technology for the chip control during machining. ...
Semiconductor lasers, sometimes called diode lasers, are not solid-state lasers. These electronic devices are generally very ... There are many different types of lasers. The laser medium can be a solid, gas, liquid or semiconductor. Lasers are commonly ... Gas lasers (helium and helium-neon, HeNe, are the most common gas lasers) have a primary output of visible red light. CO2 ... lasers). The neodymium-Yag laser emits infrared light at 1,064 nanometers (nm). A nanometer is 1x10-9 meters. ...
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Laser warning sign. Lasers are classified into four broad areas depending on the potential for causing biological damage. When ... Class IIIB - These are moderate-power lasers. *Class IV - These are high-power lasers (cw: 500 mW, pulsed: 10 J/cm2 or the ... Significant controls are required of Class IV laser facilities. For more information on lasers and related topics, check out ... Class I - These lasers cannot emit laser radiation at known hazard levels. ...
  • Join us on March 29th 4 pm MDT for a 1 Hour Online Training Course in the use of diode lasers in periodontics. (google.com)
  • Diode lasers are electrically driven lasers generally made from semiconducting materials. (nature.com)
  • Diode lasers represent a viable alternative to light sources used in many biomedical applications. (nature.com)
  • Semiconductor lasers , sometimes called diode lasers, are not solid-state lasers. (howstuffworks.com)
  • The second is the production of affordable optoelectronics such as digital cameras and diode lasers. (bmj.com)
  • Relaxation oscillation dynamics in semiconductor diode lasers with optical feedback. (tue.nl)
  • This leads to the question-just how powerful does a laser beam need to be before it can cause an explosion? (cdc.gov)
  • The laser beam was then directed into the chamber using fiber optic cables. (cdc.gov)
  • The series of tests continued until the laser beam was not powerful enough to ignite the methane or coal dust. (cdc.gov)
  • Researchers observed that the amount of laser power needed to create explosions was proportional to the laser beam diameter. (cdc.gov)
  • It produces high-quality text and graphics (and moderate-quality photographs) by repeatedly passing a laser beam back and forth over a negatively charged cylinder called a "drum" to define a differentially charged image. (wikipedia.org)
  • In 1969, Gary Starkweather , who worked in Xerox's product development department, had the idea of using a laser beam to "draw" an image of what was to be copied directly onto the copier drum. (wikipedia.org)
  • In 2005 the US Air Force assembled a new adaptive optics system that uses a laser beam to excite sodium atoms in the upper atmosphere . (newscientist.com)
  • A laser beam has an intensity profile where typically the intensity is higher in the center, which means there are more photons coming out at the center of a laser beam. (forbes.com)
  • This is what is used to levitate small objects which are comparable to the size of the laser beam. (forbes.com)
  • Since photons also have momentum, atoms or molecules moving in the opposite direction to a laser beam can be zapped with laser light which reduces the atom/molecule's velocity. (forbes.com)
  • laser [acronym for l ight a mplification by s timulated e mission of r adiation], device for the creation, amplification, and transmission of a narrow, intense beam of coherent light . (infoplease.com)
  • A laser beam heats up the parent material's surface and creates a weld pool. (sme.org)
  • The human looks at and tries to use the laser pointer, which is no longer emitting a beam. (xkcd.com)
  • A laser is basically an intense beam of light. (encyclopedia.com)
  • Laser (or light amplification by stimulated emission radiation) is a technology that allows controlled photonic release from atoms in specific wavelengths, thus producing a directional monochromatic (singlecolor) light beam of high coherence (e.g., tightly organized photons with synchronized wave fronts of the same frequency). (encyclopedia.com)
  • Several important discoveries and first observations have been made at the Trident Laser Facility , a unique three-beam neodymium-glass laser system for experiments requiring high-energy laser-light pulses. (lanl.gov)
  • Infrared laser light is used in this application both because (a) infrared laser light is invisible, making naked-eye detection of the eavesdropping device unlikely, and(b) because a laser's light is all emitted at one frequency, measurement of Doppler shift of the reflected beam is straightforward. (faqs.org)
  • A laser is a device that produces an extremely intense monochromatic, nondivergent beam of light capable of generating intense heat when focused at close range. (britannica.com)
  • The electronic micromanipulator allows sensitive, synchronous laser beam positioning and slit lamp illumination. (zeiss.com)
  • The laser beam is always centered in the slit lamp illumination field. (zeiss.com)
  • Working of Laser beam machining process. (slideshare.net)
  • Its one kind of non traditional or advanced manufacturing process.Production of laser beam and with the use of lasers how can material can be removed is to be explained over here. (slideshare.net)
  • Electron-beam (EBM) and laser beam machining (LBM) are newer thermal techniques also widely accepted in industry today. (slideshare.net)
  • Laser beam machining is based on the conversion of electrical energy into light energy and then to thermal energy. (slideshare.net)
  • 7.  Not all the materials are suitable for producing laser beam. (slideshare.net)
  • Lockheed Martin's spectral beam combined fiber lasers bring flexibility and adaptability to defensive and offensive missions," said Dr. Rob Afzal, senior fellow of laser weapon systems. (globalsecurity.org)
  • This is true, to a point, but when you're talking about interstellar distances, it's not quite true that you have to interrupt the beam to detect communications lasers. (scienceblogs.com)
  • In fact, a perfect laser beam still expands, albeit very slowly. (scienceblogs.com)
  • This is why when you see cool publicity photos of Lunar Laser Ranging experiments (the one above is from this NASA experiment ), you always see the beams shooting out of observatory domes-- they need to start their beams from a big telescope to have any hope of detecting the return beam. (scienceblogs.com)
  • this is the scale length for the expansion of a laser beam, and it depends on two experimental parameters: the size of the beam at its smallest point (the "waist"), w 0 , and the wavelength of the light λ . (scienceblogs.com)
  • The radius of a laser beam at a distance of 10 light-years, for various starting beam sizes. (scienceblogs.com)
  • For an ideal beam launch, the initial waist would match the size of the mirror on the telescope sending the laser out into space, so what this tells you is that if you start at the size of a good-sized asteroid, your beam will be the size of a slightly larger asteroid when it arrives ten light-years away. (scienceblogs.com)
  • The laser printing process works by using a laser beam to project an image onto an electrically charged, rotating drum. (xerox.com)
  • The highly collimated beam of a laser can be further focused to a microscopic dot of extremely high energy density. (gsu.edu)
  • The highly collimated beam of a laser can be further focused to a microscopic dot of extremely high energy density for welding and cutting. (gsu.edu)
  • The usefulness of the laser for such cutting operations comes from the fact that the beam is highly collimated and can be further focused to a microscopic dot of extremely high energy density for cutting. (gsu.edu)
  • This allows laser beams to be very focused (collimated) so they do not fan out like the light beam of a flashlight. (ccohs.ca)
  • There are two types of laser hazards: the laser beam hazards and the non-beam hazards. (ccohs.ca)
  • Laser beam hazards include eye and skin burns which are due to laser beam shining on a person's body. (ccohs.ca)
  • Non-beam hazards are associated with the laser equipment or the hazardous substances released from the laser equipment, and fumes emitted from materials exposed to laser beams, including laser-plumes produced during surgical procedures. (ccohs.ca)
  • The eye is the most vulnerable to injury from laser beam. (ccohs.ca)
  • The potential for injury depends on the power and wave length of the laser beam (light). (ccohs.ca)
  • The new JK2000FL offers excellent beam quality and high processing powers, presenting manufacturers with a viable and cost-effective alternative to traditional laser sources. (newswire.ca)
  • It is also fitted with JK Lasers' detachable 'plug in, pre-aligned' (PIPA) beam delivery fibers, which incorporates patented back reflection protection to protect the laser from damage when processing highly reflective materials such as aluminum, copper, brass and titanium. (newswire.ca)
  • The JK2000FL retains key benefits from JK Lasers' successful lower power models, including excellent beam quality, user-friendly software, fast modulation and pulse shaping. (newswire.ca)
  • Dye master oscillator lasers provide precise laser beam frequency, timing, and quality control. (globalsecurity.org)
  • Laser therapy is a medical treatment that uses a strong beam of light to cut, burn, or destroy tissue. (medlineplus.gov)
  • The laser light beam does not pose health risks to the patient or medical team. (medlineplus.gov)
  • Because the laser beam is so small and precise, it allows health care providers to safely treat tissue without injuring the surrounding area. (medlineplus.gov)
  • When the laser beam hits tissue such as skin, some light is reflected. (cincinnatichildrens.org)
  • The ISKRA-5 laser is a spatially filtered (image relayed) 12 beam photolytically pumped iodine gas laser capable of producing laser pulse energies of around 30 kJ and peak pulse powers of around 100 terawatts (pulsewidth about 0.25 ns) at its fundamental emission wavelength of 1.315 micrometers. (wikipedia.org)
  • ISKRA-6 would be a 128 beam laser capable of irradiating targets with ~300 kJ of laser light at the 351 nm third harmonic with pulsewidths of around 1 to 3 ns. (wikipedia.org)
  • In 2017, Astanza partnered with German-based Asclepion to introduce innovative hair removal devices and are excited to have launched the 6th generation MeDioStar diode laser in 2020. (prnewswire.com)
  • Solid-state lasers have lasing material distributed in a solid matrix (such as the ruby or neodymium:yttrium-aluminum garnet 'Yag' lasers). (howstuffworks.com)
  • Telephone fiber drivers may be solid state lasers the size of a grain of sand and consume a power of only half a milliwatt. (gsu.edu)
  • Like fiber, Free Space Optics (FSO) uses lasers to transmit data, but instead of enclosing the data stream in a glass fiber, it is transmitted through the air. (google.com)
  • How Free Space Optics (FSO) Works Free Space Optics (FSO) transmits invisible, eye-safe light beams from one "telescope" to another using low power infrared lasers in the teraHertz spectrum. (google.com)
  • The beams of light in Free Space Optics (FSO) systems are transmitted by laser light focused on highly sensitive photon detector receivers. (google.com)
  • By addressing the principal engineering challenges of Free Space Optics (FSO), this aerospace/defense activity established a strong foundation upon which today's commercial laser-based Free Space Optics (FSO) systems are based. (google.com)
  • In 1979, [6] inspired by the Xerox 9700's commercial success, Japanese camera and optics company, Canon , developed a low-cost, desktop laser printer: the Canon LBP-10. (wikipedia.org)
  • UNM Research Assistant Aram Gragossian tests lasers in one of the Department of Physics & Astronomy's optics laboratories for laser cooling experiments. (forbes.com)
  • Some additional processing is performed to make sure the laser is not obscured by ghost images caused by poor optics in some WebCams. (mathworks.com)
  • For decades Carl Zeiss Meditec has been developing high-quality therapeutic lasers featuring outstanding precision and legendary optics from ZEISS. (zeiss.com)
  • Because of this, many analysts-whether their concern is research or some range of applications-are in need of a tutorial introduction not only to the principles of lasers, their optics, and radiation, but also to their already diverse and burgeoning applications. (springer.com)
  • This resource contains demonstrations used to illustrate the theory and applications of lasers and optics. (merlot.org)
  • To learn about lasers and related optics, one usually takes a course. (merlot.org)
  • To learn about lasers and related optics, one usually takes a course or two, or acquires the necessary information from books and journal articles. (merlot.org)
  • To fill this need, Professor Ezekiel has videotaped 48 demonstrations that illustrate most of the fundamental phenomena relating to lasers and physical optics. (merlot.org)
  • By using split-screen inserts and a wide range of video-recording capabilities, it is possible to show real-time effects in lasers and optics with the simultaneous manipulation of the components that cause these effects. (merlot.org)
  • The individual student of lasers and optics who wants to observe the various phenomena covered in theoretical treatments in courses, books, and technical papers. (merlot.org)
  • The Instructor in lasers and optics in a company, university, college, or high school who wants to illustrate, in class, many of the fundamental phenomena in optics and lasers. (merlot.org)
  • The technology was originally developed to improve the propagation of high-power laser beams but is now widely used in astronomy. (newscientist.com)
  • Many hackers call it laser chicken for two reasons: It can zap you just like a laser, and the sauce has a red color reminiscent of some laser beams. (catb.org)
  • Panasonic claims to have upped the efficiency of its CRT TV recycling operating by turning to, of all things, laser beams. (theregister.co.uk)
  • Ordinary light is scattered in variable wavelengths and frequencies, whereas laser beams are highly organized light with all photons traveling in the same frequency and wavelength. (encyclopedia.com)
  • Laser beams flowing from each hole will reproduce the complete trajectory pattern of all bullets fired, making visible the entire exchange in a manner that can be photographed. (encyclopedia.com)
  • The laser system consists of three high-energy beams which can be delivered into two independent target experimental areas. (lanl.gov)
  • HELIOS will function as a faster close-in weapon that uses light beams to "defend against Chinese or Russian cruise missiles," the report said, claiming that China's in-development drone swarm is also a target of the laser. (globalsecurity.org)
  • HELIOS, named afterthe god of the sun in Greek mythology, shoots laser beams far more powerful than anything that has ever been used on a US Navy ship before. (globalsecurity.org)
  • While on Earth we tend to think of lasers as collimated beams that stay tightly concentrated over vast distances, that's really only because we never follow them all that far. (scienceblogs.com)
  • 8 laser beams have been used in Northamptonshire to connect the historic boot and shoe making towns of Wollaston and Earls Barton. (itv.com)
  • These properties enable laser devices to produce powerful laser beams that can even cut metal. (ccohs.ca)
  • Laser surgery is a type of surgery that uses special light beams instead of instruments for surgical procedures. (cincinnatichildrens.org)
  • CO2 lasers emit energy in the far-infrared, and are used for cutting hard materials. (howstuffworks.com)
  • Class I - These lasers cannot emit laser radiation at known hazard levels. (howstuffworks.com)
  • Class II - These are low-power visible lasers that emit above Class I levels but at a radiant power not above 1 mW. (howstuffworks.com)
  • Laser rods are placed in each bullet hole found in the scene and activated to emit light. (encyclopedia.com)
  • The ground-based laser-space mirror part of this effort built largely on DARPA efforts toward high-powered, gas-phase excimer lasers (that could emit in the shorter, more water-penetrating region of the electromagnetic spectrum) that had led to the demonstration of a workable, moderate power, laser-optical receiver combination. (darpa.mil)
  • Then, as the high energy particles relax (drop to a lower energy level), they emit photons and, consequently, laser light. (popsci.com)
  • One practical example is the small portable lasers in the shape of narrow flashlights, which are used to scan surfaces of a scene in search of fingerprints. (encyclopedia.com)
  • We develop a scheme in which we use a laser operating at a discrete set of equally spaced wavelengths that can be matched to the internationally standardized telecommunication wavelengths (ITU-grid). (tue.nl)
  • Narrow-linewidth and multi-wavelength lasers using our filtered feedback techniques and MMI-based integrated reflectors designed to simultaneously transmit at four different wavelengths, were shown to have good lasing characteristics. (tue.nl)
  • The Dartmouth College Laser Safety Program provides guidance for the acquisition, use, transfer, and disposal of Class IIIb and IV lasers at Dartmouth College. (dartmouth.edu)
  • Class IIIB - These are moderate-power lasers. (howstuffworks.com)
  • The main use for both lasers being the investigation into inertial confinement fusion, high energy density physics and nuclear weapons research. (wikipedia.org)
  • You can see above "the diffuse reflected cone of light returning to the photonic receiver portion of a laser scanning transceiver system in accordance with one embodiment of the invention. (zdnet.com)
  • The researchers implanted a prism on one side of the brain, so when they shone a laser through, the light would bounce off the prism-whose hypotenuse was coated in a reflective silver-and hit the other side of the brain. (wired.com)
  • When the infrared laser light coming from the microscope hits these cells, it excites the yellow fluorescent protein," says study coauthor Conor Liston, a neuroscientist and psychiatrist at the Feil Family Brain and Mind Research Institute at Weill Cornell Medicine. (wired.com)
  • The world's largest X-ray laser in Germany, promises to shed new light onto very small things by allowing scientists to penetrate the inner workings of atoms, viruses and chemical reactions. (forbes.com)
  • investigate perovskite light emitting diodes at current densities nearing 1 kA cm −2 and suggest that a laser diode is within reach. (nature.com)
  • A broadband multi-frequency Fabry-Pérot laser diode, when coupled to a high- Q microresonator, can be efficiently transformed to an ~100 mW narrow-linewidth single-frequency light source, and subsequently, to a coherent soliton Kerr comb oscillator. (nature.com)
  • A University of Colorado at Boulder news release, Scientists Using Laser Light To Detect Potential Diseases Via Breath (February 18, 2008) gives additional details. (zdnet.com)
  • The optical frequency comb is a very precise laser for measuring different colors, or frequencies, of light, said Ye. (zdnet.com)
  • Laser light can detect and distinguish specific molecules because different molecules vibrate and rotate at certain distinct resonant frequencies that depend on their composition and structure, he said. (zdnet.com)
  • The neodymium-Yag laser emits infrared light at 1,064 nanometers (nm). (howstuffworks.com)
  • Gas lasers (helium and helium-neon, HeNe, are the most common gas lasers) have a primary output of visible red light. (howstuffworks.com)
  • His thesis topic was picosecond laser spectroscopy, and he studied how molecules react picoseconds after being bombarded by laser light. (howstuffworks.com)
  • Laser light reflected from the glass toward the operator of the laser listening device will, therefore, be Doppler shifted by a continuously changing amount. (faqs.org)
  • Laser light reflected when the window is vibrating toward the laser listening device is shifted upward in frequency, while light reflected when the window is vibrating away is shifted downward. (faqs.org)
  • Embassies and other locations wishing to be secure against laser listening devices can deploy such countermeasures as multi-paned windows, exterior meshes to break up laser light, infrared laser detectors, and noise generators that add random vibrations to those caused by conversation. (faqs.org)
  • Invisible infrared light from the 200-trillion watt Trident Laser enters from the bottom to interact with a one-micrometer thick foil target in the center of the photo. (lanl.gov)
  • Lasers can be tuned to the exact wavelength of light you like-down to the nanometer. (popsci.com)
  • Instead of using a projector bulb or LEDs, it uses lasers to light the Texan Instruments DLP chip that reflects images out to the screen. (popsci.com)
  • A collaboration between researchers from SUPELEC , in Metz, France, Free University of Brussels, Belgium, and the Public University of Navarra, Spain has resulted in controlling previously chaotic laser light, just by adding a small dose of noise to the electrical current that powers it. (technologyreview.com)
  • Typically, data sent using such lasers is encoded by rapidly changing the frequency or phase of the light. (technologyreview.com)
  • Light from the laser can then be converted to electricity. (popsci.com)
  • In a typical laser, flashes of light or electricity excite the molecules inside a lasing medium (which can be a gas, liquid, or solid) to high energy levels. (popsci.com)
  • The laser light could then be converted into electricity. (popsci.com)
  • Degradation of the cleaved light output surface of a semiconductor crystal injection laser is reduced through control of surface recombination by providing an annealed optically transparent coating at least one ingredient of which has a higher bandgap than said crystal over the cleaved light output surface. (google.com)
  • 1. In a semiconductor crystal laser of the type having an active lasing region in a laser crystal of semiconductor material essentially perpendicular to a cleaved light output surface, the improvement for reducing heating produced by carrier surface recombination at said cleaved surface comprising, an annealed coating of an optically transparent compound, at least one element thereof having a higher bandgap than that of said laser crystal. (google.com)
  • 4. In a semiconductor crystal injection laser having at least one cleaved light output surface and ohmic contacts on the surfaces perpendicular thereto, the improvement comprising an annealed optically transparent coating of a surface recombination control material, at least one ingredient of which has a bandgap greater than that of said semiconductor crystal covering said at least one cleaved surface. (google.com)
  • The technical field of the invention is that of semiconductor injection lasers wherein an input current is converted to a coherent light output. (google.com)
  • The proteins' unusual structure appears to cause them to absorb more light than healthy tissue, which means a laser could theoretically detect their presence. (scientificamerican.com)
  • Laser warning light outside the laser therapy room indicates when the laser is switched on. (zeiss.com)
  • Pigment change (too light or too dark) can occur after laser surgery. (ohsu.edu)
  • 3.  Introduction:-  The term "laser" is an stands for Light Amplification by Stimulated Emission of Radiation. (slideshare.net)
  • The Shard is seen lit up during a laser light show from Tower Millennium Pier in London, England. (baltimoresun.com)
  • The light signals can be modulated with the information to be sent by either light emitting diodes or lasers. (gsu.edu)
  • The use of lasers, radiofrequency (RF), and light-based technologies in cosmetic procedures has swelled in recent years, as device manufacturers explore the outer limits of safe energy-based approaches and physicians increasingly purchase new, clinically proven devices. (modernmedicine.com)
  • While laws vary from state to state as to who in a practice can legally operate a laser or light source or energy-based device, the responsibility often lies with the practice physician, according to Mathew M. Avram, M.D., J.D. (modernmedicine.com)
  • Laser and light source treatments target many of the most common skin conditions that dermatologists encounter. (modernmedicine.com)
  • New technologies are taking laser and light source treatments in new directions of skin structure imaging, epidermal harvesting, tissue rejuvenation, and new types of photodynamic therapies. (modernmedicine.com)
  • The Extreme Light Infrastructure for Nuclear Physics (ELI-NP) project in Romania recently reached on March 20, 2019 a significant milestone: the ultra-high intensity laser system developed by Thales has successfully generated its first pulses at a peak power level of 10 petawatts (PW) equivalent to 1016 watts : 10.9PW, 327] at 1 shot/min compressed in a pulse just 22.3 femtoseconds long to be precise. (thalesgroup.com)
  • Laser light is a form of non-ionizing radiation. (ccohs.ca)
  • Laser equipment produces and amplifies light that has unique properties that cannot be produced any other way. (ccohs.ca)
  • Laser radiation can be generated in different parts of the spectrum - ultraviolet (UV), visible light, and infrared (IR). (ccohs.ca)
  • The color of laser light is usually described in terms of the wavelength of the laser radiation. (ccohs.ca)
  • Another property of lasers is they are coherent light sources. (ccohs.ca)
  • This means that lasers produce monochromatic light (i.e., with a single or selected wavelength) in which the light "particles" or photons all travel in the same direction. (ccohs.ca)
  • However, visible laser light can be so intense that it can do damage faster than a blink of an eye. (ccohs.ca)
  • The atomic vapor laser isotope separation (AVLIS) process is based on the fact that 235 U atoms and 238 U atoms absorb light of different frequencies (or colors). (globalsecurity.org)
  • Although the absorption frequencies of these two isotopes differ only by a very small amount (about one part in a million), the dye lasers used in AVLIS can be tuned so that only the 235 U atoms absorb the laser light. (globalsecurity.org)
  • As the 235 U atom absorbs the laser light, its electrons are excited to a higher energy state. (globalsecurity.org)
  • The vapor stream flows through the collector, where it is illuminated by the precisely tuned laser light. (globalsecurity.org)
  • The AVLIS laser system is a pumped laser system comprised of one laser used to optically pump a separate dye laser, which produces the light used in the separation process. (globalsecurity.org)
  • The laser light emerging from the dye master oscillator laser is increased in power by passage through a dye laser amplifier. (globalsecurity.org)
  • The laser is set to a particular wavelength to reach right to the base of each hair, right to the follicle. (kisslaserhair.co.uk)
  • Hybrid perovskite semiconductors are promising for wavelength-tunable laser diodes but their behavior under intense electrical excitation remains unexplored. (nature.com)
  • The project yielded an efficient laser-receiver and a narrowband, matched-wavelength excimer-Raman converter laser system, which was used in successful demonstrations in 1988 of aircraft-to-submerged-submarine communication in 1988, after transfer of the Submarine Laser Communications-Satellite (SLCSAT) program to the Navy in 1987. (darpa.mil)
  • The most common unit used for the wavelength of laser is a nanometer (nm - one billionth of a meter). (ccohs.ca)
  • The example laser system shown below uses a quantum dot optical amplifier combined with one or two electro-optically tunable wavelength filters. (tue.nl)
  • In the framework of the iPHOS FP7 EU project linear and ring dual wavelength lasers have been fabricated in the COBRA and Oclaro fabrication platforms for millimeter wave communications applications. (tue.nl)
  • Digitally tunable dual wavelength emission from semiconductor ring lasers with filtered optical feedback. (tue.nl)
  • Semiconductor ring laser with on-chip filtered optical feedback for discrete wavelength tuning. (tue.nl)
  • Scientists at the University of Cambridge say the process involves short laser pulses to erase words and images by heating the printed material to the point that it vaporizes. (upi.com)
  • A linear sequence of up to 12 laser pulses can be triggered at the touch of a button on the slit lamp joystick. (zeiss.com)
  • Our drilling processes employ ultra-short laser pulses (in the picosecond range) that remove glass through nonlinear effects. (corning.com)
  • ISKRA-6 is a laser under investigation for future construction by VNIIEF which would be in the near-NIF and LMJ class of extremely high energy, high power frequency tripled Nd:glass lasers used to access the ignition regime of imploding DT fusion fuel capsules for nuclear weapons research. (wikipedia.org)
  • On 01 March 2018 the U.S. Navy awarded Lockheed Martin a $150 million contract, with options worth up to $942.8 million, for the development, manufacture and delivery of two high power laser weapon systems, including intelligence, surveillance and reconnaissance (ISR) and counter-Unmanned Aerial System (counter-UAS) capabilities, by fiscal year 2020. (globalsecurity.org)
  • The US destroyer Preble will be the first to be equipped with the High Energy Laser and Integrated Optical-dazzler With Surveillance system, or HELIOS, in 2021, US military newspaper Stars and Stripes reported on 27 May 2019. (globalsecurity.org)
  • Excimer lasers (the name is derived from the terms excited and dimers ) use reactive gases, such as chlorine and fluorine, mixed with inert gases such as argon, krypton or xenon. (howstuffworks.com)
  • Soon after, however, the Navy and DARPA agreed that the risks and expenses in developing new solid-state for the blue-green lasers would perhaps be more acceptable than those associated with going ahead with the gas-excimer laser systems in space. (darpa.mil)
  • Excimer lasers would expand into medical arenas, especially for corrective eye surgery. (darpa.mil)
  • Researchers conducted over 1,000 ignition experiments with powerful lasers, studying several variables that can contribute to an explosion. (cdc.gov)
  • With some of the most powerful lasers in the world the conditions found in the core of the Sun can be recreated in laboratories on Earth. (forbes.com)
  • Researchers at the Oak Ridge National Laboratory (ORNL) have built a new optical surveillance based on lasers. (zdnet.com)
  • A modest laser focused onto a satellite could temporarily blind or permanently damage its optical or infrared sensors. (newscientist.com)
  • In addition to the optical considerations common with all semiconductors, diode laser structures must also incorporate a means of injecting an electrical current into the active region. (nature.com)
  • The laser is sometimes referred to as an optical maser . (infoplease.com)
  • According to the Optical Society of America (OSA), U.S. researchers have shown it is possible to use lasers to analyze our breath to detect diseases such as asthma or cancer. (zdnet.com)
  • A breakthrough makes it possible to tune the color of a nano-scale laser in real time - and that could be the key to making useful, real-world nano-optical devices. (extremetech.com)
  • Regular optical and laser mice track marks on the surface of the table, but glass is too flat and too see-through. (wired.com)
  • Consists of an optical laser link and mechanical adapter and is equipped with a physician's safety filter. (zeiss.com)
  • With the High Energy Laser and Integrated Optical-dazzler with Surveillance (HELIOS) system, Lockheed Martin will help the Navy take a major step forward in its goal to field laser weapon systems aboard surface ships. (globalsecurity.org)
  • We are developing a semiconductor optical chip with a laser source that can achieve the tuning requirements for rapid spectral scanning and plan to integrate further OCT apparatus for full system-on-chip solutions. (tue.nl)
  • PMRD researchers have taken an experimental approach to help reduce the risk of ignition by lasers used in potentially explosive environments. (cdc.gov)
  • Researchers also measured the time delays for producing laser ignitions, which can be used for designing automatic safety shutoffs. (cdc.gov)
  • As I mentioned above, the researchers at ORNL have been granted a U.S. patent for this device on March 23, 2006 under the name "Laser scanning system for object monitoring. (zdnet.com)
  • Now, shining a laser into a normal mouse's brain isn't going to do you any good, which is why the researchers used mice genetically engineered to express a yellow fluorescent protein in their neurons. (wired.com)
  • CAMBRIDGE, England, March 15 (UPI) -- British researchers say they've developed a laser process that can "uncopy" toner ink from paper as an alternative to traditional recycling. (upi.com)
  • When Australian researchers tested 62 laser printers, they discovered that a third of the machines emitted tiny toner particles that can enter a person's lungs and cause damage similar to that created by smoking. (menshealth.com)
  • In their study published today, Tuesday 20 September, in IOP Publishing's journal Biofabrication , researchers used lasers to create intricate scaffolds, with features one thousand times smaller than a millimetre, and demonstrated their ability to effectively harness the growth of neuronal cells. (medicalnewstoday.com)
  • The Laser became a men's Olympic -class boat at the 1996 Summer Olympics in Atlanta, and a special Olympic edition of the boat was released that year in commemoration. (wikipedia.org)
  • Helium-neon and semiconductor lasers have become standard parts of the field surveyor's equipment. (gsu.edu)
  • Another useful application of lasers in forensic science is spectroscopy. (encyclopedia.com)
  • Laser spectroscopy determine the molecular structure of materials and chemical compounds. (encyclopedia.com)
  • Infrared laser spectroscopy can determine molecular structures of polymers on surfaces and gas phase ions, and is used to detect explosive components or illegal drugs in samples. (encyclopedia.com)
  • Often more than one method is used to detect toxic industrial components present in the environment, such as coupling plasma mass spectrometry with laser spectroscopy. (encyclopedia.com)
  • The complexity of the spectroscopy of uranium atoms and compounds may require incorporation of any number of available laser technologies. (globalsecurity.org)
  • Quantum Cascade Laser Spectroscopy: Applications and Developments (PhD). University of Oxford. (wikipedia.org)
  • Several manufacturers have received clearance for argon and carbon dioxide lasers to activate tooth-bleaching solutions and to treat gum disease. (fda.gov)
  • Quote: "Similarly, a 125mW HeNe laser, together with a receiver constructed from a 12 inch telescope and Photo-Multiplier-Tube, has been used in a one waycontact over 110 miles. (google.com)
  • In the STW LWAVETECH project we focus on tunable lasers for gas detection based on an AWG laser and new interferometer lay-out structures. (tue.nl)
  • The lasers have significant advantages because they are more nearly monochromatic and this allows the pulse shape to be maintained better over long distances. (gsu.edu)
  • Medical lasers have been used for dermatology applications such as removal of port wine stains, dark spots, tattoos, acne scars and other blemishes for over a decade. (fda.gov)
  • Among its many accomplishments, Astanza is proud to be the exclusive tattoo removal laser provider for LaserAway , the Nation's Leader in Aesthetic Dermatology, and also a trusted laser provider for Homeboy Industries , the largest gang intervention and re-entry program and the #1 busiest laser tattoo removal provider in the world. (prnewswire.com)
  • The recent expansion in laser dermatology is both promising and exciting as the treatments available to derms and their patients continue to grow. (modernmedicine.com)
  • In the coal mining industry, lasers can be used to detect the presence of dangerous gases, to monitor the level of coal in storage facilities, and to survey the underground mine, just to name a few. (cdc.gov)
  • The laser can scan many points per second and can detect small changes -- less than a centimeter -- in the reflected signal, meaning tampering can be immediately detected. (zdnet.com)
  • Our High Energy Lasers, or HEL are designed to detect and track manned and unmanned airborne vehicles, shipboard, ground-mobile and ground-based platforms. (raytheon.com)
  • Today's lasers have become more specialized and targeted, thereby offering the option to treat specific problems or conditions with less discomfort and downtime. (ohsu.edu)
  • Since then, laser printing has evolved to become today's business standard for convenience and quality. (xerox.com)
  • The Trident Laser Facility at Los Alamos National Laboratory is an extremely versatile neodymium-glass laser system dedicated to high energy density physics research and fundamental laser-matter interactions. (lanl.gov)
  • The ParFocus™ zoom system delivers a homogeneous, sharply defined and reproducible laser spot on the retina and minimizes heat-related side effects on the patient's cornea. (zeiss.com)
  • Lasers are used for photocoagulation of the retina to halt retinal hemorrhaging and for the tacking of retinal tears. (gsu.edu)
  • During an office visit, clinicians can use either a CO₂ laser, most commonly used, or a YAG laser. (medscape.com)
  • Some commonly used lasers are given in the following table. (ccohs.ca)
  • These vertical-cavity surface-emitting lasers (VCSELs) are less expensive to mass-produce than other lasers, and they couple more efficiently than other lasers with the fiber-optic cables used in these networks. (technologyreview.com)
  • Laser cooling works by reducing the momentum of atoms or molecules. (forbes.com)
  • Atomic and molecular laser isotope separation (LIS) techniques use lasers to selectively excite atoms or molecules containing one isotope of uranium so that they can be preferentially extracted. (globalsecurity.org)
  • Numerous high quality contact lenses for therapeutic laser applications such as iridotomy, trabeculoplasty and retinal photocoagulation. (zeiss.com)
  • In diabetic maculopathy, direct ophthalmoscopy can reveal retinal exudates, but the degree of macula oedema, which usually underlies the decision to treat by laser photocoagulation, 1 is less clear. (bmj.com)
  • The advances in ultrashort pulse generation and chirped pulse amplification (CPA) techniques have been the driving force in the development of laser systems with peak powers at and beyond the Terawatt (10 12 W) level 1-7 . (springer.com)
  • Palanker D, Blumenkranz MS. Retinal laser therapy: biophysical basis and applications. (medlineplus.gov)
  • Specifically, Gary Starkweather invented the laser printer in 1969 at the Xerox research lab in Webster, New York. (xerox.com)
  • If the test resulted in an explosion, the laser power was reduced and the experiment was repeated. (cdc.gov)
  • Laser ignition power thresholds for methane and coal dust were measured. (cdc.gov)
  • Limiting the laser power to levels below the thresholds will minimize the risk of ignition. (cdc.gov)
  • Most high power systems developed to date, work in the infrafed, and Terawatt and Petawatt (10 15 W) class lasers have been demonstrated in Ti:Sapphire, Nd:glass and Cr:LISAF based systems. (springer.com)
  • These early tests would involve low-power lasers rather than high-energy ones that could serve as weapons. (newscientist.com)
  • By focusing a high-power laser onto a 'fusion' target it can turn into a plasma and cause an implosion. (forbes.com)
  • Class IIIA - These are intermediate-power lasers (cw: 1-5 mW), which are hazardous only for intrabeam viewing. (howstuffworks.com)
  • Class IV - These are high-power lasers (cw: 500 mW, pulsed: 10 J/cm 2 or the diffuse reflection limit), which are hazardous to view under any condition (directly or diffusely scattered), and are a potential fire hazard and a skin hazard. (howstuffworks.com)
  • Its built-in thermoelectric cooling system ensures excellent temporal stability of the laser power and thus meets the requirements for reproducible clinical results. (zeiss.com)
  • One of the most common laser materials and also one capable of delivering high power is the chromium on a ruby crystal. (slideshare.net)
  • In contrast, the Laser Weapon System (LaWS) that was mounted on the amphibious transport dock of the USS Ponce in 2014 had a laser power of about 30 kilowatts. (globalsecurity.org)
  • Xerox ® AltaLink ® multifunction laser printers are ConnectKey technology -enabled, high-volume devices with scalability, power and security for large workgroups. (xerox.com)
  • Higher power lasers are used after cataract surgery if the supportive membrane surrounding the implanted lens becomes milky. (gsu.edu)
  • EDCO, a Florida based leader in the online award plaques industry, has recently installed a high power CO2 laser, one that no one else in the entire industry has ever used before. (prweb.com)
  • The CIRCM laser would use low-power lasers to jam missile guidance systems - a few dozen watts, rather than tens of thousands of watts, like the laser weapon system demonstrated last year. (foxnews.com)
  • The Lab says that it's Solid State Heat Capacity Laser (SSHCL) has now achieved an average power output of 67kW, bringing it tantalisingly close to the 100kW target the military would like. (techradar.com)
  • Chemical lasers, by contrast, produce more power - up to one megawatt - but are big, heavy and require vast vats for storing the chemicals, shedding doubt on their use as battlefield weapons. (techradar.com)
  • The green "Laser Power Switch" controls power to the laser tube. (cmu.edu)
  • Turn off the "Lighting", "Laser Power Switch", and "Socket Switch" buttons to cut power to the laser, chiller, and blower. (cmu.edu)
  • Mach-Zehnder modulators integrated with these lasers could be operated up to 12.5 Gbps with output power up to 4 mW in the fiber. (tue.nl)
  • The progress in this field has certainly been inspired by the improvements in solid-state laser materials for ultrashort pulse generation. (springer.com)
  • Trident's one-of-a-kind, long-pulse capabilities have enabled state-of-the-art innovations in laser-launched flyer-plates and other unique loading techniques for material dynamics research. (lanl.gov)
  • High pulse energy UV ns laser: >1 mJ @ 50 kHz. (photonics.com)
  • Pulsed laser radar can measure distance in the same manner as microwave radar by timing how long it takes a laser pulse to bounce back from a distant object. (britannica.com)
  • A fast laser pulse is sent to a corner reflector at the point to be measured and the time of reflection is measured to get the distance. (gsu.edu)
  • A powerful laser pulse from the MacDonald Observatory in Texas had spread to about a 3 km radius by the time it got to the Moon, but the reflection was strong enough to be detected. (gsu.edu)
  • A library for pulse lasers is also being developed for the generic integration platform. (tue.nl)
  • Laser fluorescence is another method of analysis that can be used at the crime scene. (encyclopedia.com)
  • These topics include: Sulcular Debridement (sometimes termed Laser Curettage), Laser-Assisted New Attachment Procedure (LANAP), Reduction of Bacteria Levels in periodontal pockets (sometimes termed Pocket Sterilization), Laser-facilitated Wound Healing, Laser Root Planing, Aid in the Diagnosis of Caries (Laser Fluorescence), and other Hard Tissue Applications including endodontics. (ada.org)
  • But on the picture above, you can see "CU-Boulder physics doctoral student Michael Thorpe holds a detection chamber next to a novel laser apparatus at JILA. (zdnet.com)
  • Marc Sciamanna , a professor of physics at SUPELEC, says that the work is important because it could improve a popular type of laser used in telecommunications applications. (technologyreview.com)
  • As with digital photocopiers , laser printers employ a xerographic printing process. (wikipedia.org)
  • Injection lasers employ a semiconductor crystal of a binary or mixed compound of elements usually from group III and group V of the periodic table. (google.com)
  • laser technologies are being developed for a variety of applications. (cdc.gov)
  • This conference is part of a continuing series dedicated to recent developments and applications of x-ray lasers and other coherent x-ray sources with attention to supporting technologies and instrumentation. (springer.com)
  • Applications for and research on lasers in dentistry continues to expand since their introduction to the dental profession. (ada.org)
  • Given the many factors that are appropriate to evaluate when using lasers in biological systems, the Council feels that the 510(k) process alone is not inherently sufficient to scientifically demonstrate safety, efficacy, or effectiveness for marketed dental laser applications in all cases. (ada.org)
  • Sheet-fed production laser printers are ideal for graphic communications and commercial print providers' high-volume printing applications, including publishing, transactional-promotional printing, direct mail, print-on-demand, short runs, packaging, photo publishing and marketing collateral. (xerox.com)
  • The CLT 500X is a laser processing workstation designed for high-precision applications in the glass, precision engineering, and electronics industries. (corning.com)
  • Thales proposes a wide range of lasers solutions for the most demanding applications. (thalesgroup.com)
  • Lasers today are being used in an ever-increasing number of applications. (merlot.org)
  • We provide innovative laser weapon systems with 360 degree coverage for sea, land and air applications. (raytheon.com)
  • About AdValue Photonics: AdValue Photonics is a leading manufacturer of innovative fiber lasers for the materials processing, sensing, scientific and medical applications. (prnewswire.com)
  • In this first increment of the U.S. Navy's Surface Navy Laser Weapon System program, Lockheed Martin will deliver two units for test by fiscal year 2020. (globalsecurity.org)
  • The Navy plans to put a HELIOS laser weapon on ships by early 2020. (globalsecurity.org)
  • DALLAS , July 1, 2020 /PRNewswire/ -- Astanza Laser , the leader in lasers for tattoo removal, hair removal, and other aesthetic procedures, is celebrating its 10 year anniversary and successful growth from a humble startup to an industry leader with a diverse product line and numerous clients across the world. (prnewswire.com)
  • Alpes Lasers S.A. Retrieved April 29, 2020. (wikipedia.org)
  • Are you interested in purchasing a soft-tissue laser within the next 6 months? (google.com)
  • Several lasers have clearance for hard tissue use on teeth. (fda.gov)
  • Lasers may be used to remove tissue in eye surgery as well. (fda.gov)
  • Study co-author Professor Frederik Claeyssens said, 'This is the first time we have been able to structure polylactide with such high resolution and the first time that direct laser writing has been applied to tissue engineering. (medicalnewstoday.com)
  • Since that time, lasers have improved and many new types of laser have been developed, including those that can clot, cut or get rid of tissue. (cincinnatichildrens.org)
  • An ultra-fast, titanium sapphire laser was tightly focused on the PLA material and moved through three dimensions to create complicated sub-micrometer structures. (medicalnewstoday.com)
  • In 1972, Starkweather worked with Butler Lampson and Ronald Rider to add a control system and character generator, resulting in a printer called EARS (Ethernet, Alto Research character generator, Scanned laser output terminal)-which later became the Xerox 9700 laser printer. (wikipedia.org)
  • Their Laser-Based Item Monitoring System (LBIMS) is designed to protect high-value items in high security environments. (zdnet.com)
  • The precision of the system is made possible by a high-resolution two-axis laser scanner capable of looking at a 60-degree field of view in 0.0005-degree increments, dividing the field of view into more than 10 billion individual pointing locations. (zdnet.com)
  • These tests will determine how well the system could aid laser tracking of a satellite in low-earth orbit. (newscientist.com)
  • FDA does not recommend one laser system over another. (fda.gov)
  • On May 7, 1997 FDA cleared the first laser system for treating tooth decay, an erbium YAG laser made by Premier Laser Systems. (fda.gov)
  • Additions to the laser/traditional cutting machine genus include Okuma, with its LaserEx products, Tsugami/REM Sales with its integrated lasers in its LaserSwiss models, and Marubeni Citizen-Cincom Inc. with the Laser System L2000. (sme.org)
  • Marubeni Citizen-Cincom Inc. , Allendale, N.J., has added laser cutting and welding to its arsenal with the addition of the Laser System L2000. (sme.org)
  • So the country will doubtless see a sharp increase CRT recycling very soon - making the laser-based recycling system a welcome tool. (theregister.co.uk)
  • The FDA includes in its review dental laser system specifications and safety mechanisms in relationship to already cleared devices. (ada.org)
  • Lockheed Martin s HELIOS laser weapons system may eventually replace Gatling guns and missile launchers on US Navy ships. (globalsecurity.org)
  • A high-energy laser system: The high-energy fiber laser will be designed to counter unmanned aerial systems and small boats. (globalsecurity.org)
  • The CLT 45G NX laser system is specifically designed for cutting and drilling strengthened and nonstrengthened glass and other crystalline materials, as well as processing micro materials. (corning.com)
  • But smaller lasers that disrupt rather than destroy could be an even simpler defense system. (foxnews.com)
  • Raytheon, which built a laser that cooked a UAV in flight last year, is one of several defense firms working on lasers that take a somewhat more passive approach, such as disabling a missile's guidance system to prevent it from connecting with its target. (foxnews.com)
  • This means the laser could be customized to seek out and cripple an enemy system dependent on electronics - whether it's a guided missile or an aircraft. (foxnews.com)
  • With a mean time to failure (MTTF) of over 300,000 hours, the diode laser pump source used in the JK2000FL enables extended system lifetimes. (newswire.ca)
  • The AVLIS process consists of a laser system and a separation system. (globalsecurity.org)
  • Combat proven, with nearly four million operational flight hours, our Multi Spectral Targeting System ™ combines the most advanced laser designation capability with infrared sensors and fiber to enable pinpoint military operations. (raytheon.com)
  • With proprietary fiber laser and system design, the machine can drill glass substrates with thickness from 50µm to 10mm with hole size 50µm to 90mm in diameter. (prnewswire.com)
  • The machine is equipped with a cutting-edge fiber laser, motion system, camera alignment system, and granite surface plate to provide low maintenance cost, high precision and to boost productivity. (prnewswire.com)
  • Ohanian quotes a factor of 10 advantage for the laser modulators. (gsu.edu)
  • Programmable electronics control the 40 to 50 phase modulators to scan the laser in any possible way. (tue.nl)
  • Laser Concept  The electrons are charged particles, they carry some energy. (slideshare.net)
  • We have established strong and long-term relation with well-known laboratories and partners ensuring smooth research to industry transfer of new processes and lasers concepts. (thalesgroup.com)
  • Present systems for enrichment processes using lasers fall into two categories: those in which the process medium is atomic uranium vapor and those in which the process medium is the vapor of a uranium compound. (globalsecurity.org)
  • Common nomenclature for such processes include "first category- atomic vapor laser isotope separation (AVLIS or SILVA)" and "second category- molecular laser isotope separation (MLIS or MOLIS). (globalsecurity.org)
  • Li, F. and Xie, J., "Metal Cutting Chip Breaking by Lasers," SAE Technical Paper 2001-01-0981, 2001, https://doi.org/10.4271/2001-01-0981 . (sae.org)
  • The Pentagon's anti-satellite project is part of a broad thrust to develop laser weapons including the Airborne Laser, for missile defence, and the Advanced Tactical Laser, for possible use on the battlefield. (newscientist.com)
  • Laser technologies are used for a wide range of purposes in laser-based products, including CD players, DNA screening machines, forensic tools, missile guiding devices, mapping and topographic instruments, and surgical devices. (encyclopedia.com)
  • The above diagram illustrates the interaction of multiple retroreflectors with multiple laser scanning transceiver systems. (zdnet.com)
  • Laser listening devices-sometimes termed laser-bounce listening devices-are remote-eavesdropping systems that do not require the placement of a microphone or bug in the space to be monitored. (faqs.org)
  • Micro Laser Systems Inc. (photonics.com)
  • Dental laser systems are cleared for marketing in the United States via the Food and Drug Administration (FDA) Premarket Notification [510(k)] process. (ada.org)
  • The statement also provides a brief overview of the FDA's 510(k) process and educational options for dental laser systems. (ada.org)
  • The HELIOS program is the first of its kind, and brings together laser weapon, long-range ISR and counter-UAS capabilities, dramatically increasing the situational awareness and layered defense options available to the U.S. Navy," said Michele Evans, vice president and general manager of Integrated Warfare Systems and Sensors. (globalsecurity.org)
  • HELIOS is one component of the Navy Laser Family of Systems and a major portion of the Navy's incremental strategy for delivery of increased laser weapon capability," Colleen O'Rourke, Spokeswoman for Naval Sea Systems Command, told Warrior Maven. (globalsecurity.org)
  • In addition to delivering cutting-edge medical laser devices such as the Duality, Trinity, MeDioStar, and DermaBlate systems, Astanza offers its customers a complete range of training, marketing, and business consulting services specific to achieving success in this growing field. (prnewswire.com)
  • Fractioned laser systems for skin resurfacing can be separated into four categories and there are benefits to each type depending on the type of patient being treated. (modernmedicine.com)
  • The company is also using off-the-shelf, lightweight fiber lasers that can go on any helicopter, which would solve the weight problem that has plagued airborne laser systems. (foxnews.com)
  • Drawing on decades of manufacturing expertise, Raytheon continues to define the future for high energy laser systems, target designators and next generation laser range finders. (raytheon.com)
  • Your hair roots need to be present for laser energy to be absorbed and hit the hair follicles (the whole aim is to destroy the hair follicles). (beyondtalk.net)
  • The automobile industry makes extensive use of carbon dioxide lasers with powers up to several kilowatts for computer controlled welding on auto assembly lines. (gsu.edu)
  • But the working surfaces of the cams can be heated quickly with a carbon dioxide laser and hardened without appreciably affecting the remainder of the shaft, preserving the precision of manufacture. (gsu.edu)
  • Lasers can heat up materials to extremely high temperatures - more than a million degrees. (forbes.com)
  • Studies conducted by the manufacturers showed that the laser is as safe and effective as a high-speed drill for removing dental decay and preparing a cavity for a filling. (fda.gov)
  • The laser position is determined by thresholding the red plane and looking for high intensity values. (mathworks.com)
  • The cleaved mirror surface tends, in use, to degrade catastrophically when the laser operates at high current values and it degrades systematically when the laser is operated at lower current values. (google.com)
  • Laser printers are best known for their fast speed, high reliability and impressive print quality. (xerox.com)
  • Laser printers are a good option for those printing a few hundred pages per month, as well as for high-volume environments printing thousands. (xerox.com)
  • Xerox ® Production Printers and Digital Presses take laser printer technology to a new level, combining vibrant print quality with high-speed productivity. (xerox.com)
  • We have a diverse fleet of high-quality and long-lasting laser printers. (hp.com)
  • Our HP color laser printers can print gorgeous images on a variety of different print mediums, and they're built to handle high volume printing projects. (hp.com)
  • Since their start, Astanza has expanded its tattoo removal focused product line to include technologies that treat a wide variety of high-demand aesthetic procedures including laser hair removal, skin resurfacing, vascular lesion removal, and much more. (prnewswire.com)
  • We partnered with U.S. Special Operations Command and Project Management Office Apache Attack Helicopter to demonstrate the feasibility of high energy lasers on rotary wing aircraft. (raytheon.com)
  • By adding a laser and a maser (a microwave laser) to an engine, he hopes to squeeze extra energy out of the hot engine exhaust-a "quantum afterburner," as he calls it. (popsci.com)