An optical variable device or optically variable device (OVD) is an iridescent or non-iridescent security feature that exhibits ... OVDs are based on diffractive optical structures. This gives cards the appearance of having different patterns, colours, and ... "More about Optically Variable Devices (OVDs)" Product Authentication & Security Directory Council of the European Union, ... OVDs are often used as security devices and anti-counterfeiting measures on banknotes, government-issued identification ...
The Centre for Ultrahigh bandwidth Devices for Optical Systems (or CUDOS) was a collaboration of Australian and international ... CUDOS aims to be the world-leader in research in on-chip photonics, for all-optical signal processing. The centre conducts ... On-chip Nanoplasmonics: The refractive index of metals is very high, so the wavelength of the optical modes is very short. ... They are investigating novel modes of light propagation in these materials and use them to create ultracompact devices like ...
Optical devices). ... The optical mode is leaky, but relatively low-loss propagation ... In optics, an ARROW (anti-resonant reflecting optical waveguide) is a type of waveguide that uses the principle of thin-film ... and Devices. 5515: 67. Bibcode:2004SPIE.5515...67S. doi:10.1117/12.558946. S2CID 137407772. Yin, D.; Schmidt, H.; Barber, J.P ... "Antiresonant reflecting optical waveguides in SiO2‐Si multilayer structures". Applied Physics Letters. 49 (1): 13-15. Bibcode: ...
Optical devices). ... A Manual for Optical Evaluation and Adjustment, Willmann-Bell ... A Cheshire eyepiece or Cheshire collimator is a simple tool that helps aligning the optical axes of the mirrors or lenses of a ... Optical Society, 22, 235 (1921) doi:10.1088/1475-4878/22/5/303 Pepin, M. B., Care of Astronomical Telescopes and Accessories, ... A Cheshire eyepiece contains no lenses or other polished optical surfaces. The tool was first described by F. J. Cheshire in ...
Optical devices. Various drop formation technologies exist, and can be classified into two main types: continuous inkjet (CIJ) ... The use of a piezoelectric device should not be confused with Drop-On-Demand Inkjet which uses the piezo to generate sound ... There are many patents and methods to expel drops with piezoelectric devices. A piezo changes shape when voltage is applied. ... Fluid streams can be broken into different size drops with vibration from a piezoelectric device. ...
X-ray instrumentation, Optical devices). ... "Microstructured optical arrays". Archived from the original on ... Microstructured optical arrays (MOAs) are instruments for focusing x-rays. MOAs use total external reflection at grazing ... The focal length of this system can be calculated using the geometry shown below: Current microstructured optical arrays are ...
... is the manufacture and maintenance of optical parts and devices. This includes the design and manufacture of ... Optical tables, breadboards, and rails Mirror mounts Optical mounts Translation stages Rotary stage Optical fiber aligners ... screws and screw sets Optomechanics also covers the methods used to design and package compact and rugged optical trains, and ... hardware used to hold and align elements in optical systems, such as: ...
Diffraction grating Liquid crystal (Optical devices). ... Optical axis gratings (OAGs) are gratings of optical axis of a ... Numerous modulation profiles allow variation in the optical properties of the OAGs. The optical axis in a transverse or ... in which the refractive index is modulated and the direction of the optical axis is constant. The optical axis in OAGs can be ... In another type of OAG, the optical axis is modulated in the direction of light propagation with a modulation period equal to a ...
Optical devices, Light sources). ...
"Optical Fibre Nanowires and Related Devices Group". University of Southampton. Archived from the original on 2007-02-20. Dumais ... ultrathin optical fibres, optical nanofibre, optical microfibres, submicron fibre waveguides, micro/nano optical wires (MNOW). ... optical nanowires, optical fibre nanowires, tapered (optical) fibre, fibre taper, submicron-diameter silica fibre, ... A subwavelength-diameter optical fibre (SDF or SDOF) is an optical fibre whose diameter is less than the wavelength of the ...
The optical effect of a TN device in the voltage-on state is far less dependent on variations in the device thickness than that ... "LCD optical waveguide device". Archived from the original on March 19, 2022. Retrieved September 24, 2020. Explanation of CCFL ... A liquid-crystal display (LCD) is a flat-panel display or other electronically modulated optical device that uses the light- ... Method of and device for generating an image having a desired brightness; D.A. Stanton; M.V.C. Stroomer; A.J.S.M. de Vaan; US ...
"Light guide optical device". Google Patents. tiny-augmented-reality-displays Feist, Jonathan. "Lumus - military grade ... The LOE is a patented optical waveguide that makes use of multiple partial reflectors embedded in a single substrate to reflect ... Founded in 2000, Lumus has developed technology for see-through wearable displays, via its patented Light-guide Optical Element ... Navigation Mobile applications Gaming Military Using Lumus Optical Engines (OE) or development kits allows smart eyewear ...
Garmire, E.; Marburger, J. H.; Allen, S. D.; Winful, H. G. (1979-03-15). "Transient response of hybrid bistable optical devices ... Early career research included collaborations with Elsa Garmire and John Marburger on the study of bistable optical devices, ... Garmire, E.; Marburger, J. H.; Allen, S. D. (1978-03-01). "Incoherent mirrorless bistable optical devices". Applied Physics ... She is a fellow of SPIE, a senior member of IEEE, an emeritus member of The Optical Society, and a past director of the ...
Installed modernized light-optical devices. "History of my city. Makhachkala". - Makhachkala, 2017. p. 160 Lighthouse. ...
E.), SIBEL KIM BAKAL (YOUNG S. NOZ, MARILYN; Kim, Young S.; Noz, Marilyn E. (June 12, 2019). Mathematical Devices for Optical ... and Mathematical Devices for Optical Sciences. Kim is an honored member of the International Association of Top Professionals ( ... ISBN 9789813237728 Mathematical Devices for Optical Sciences (2019) ISBN 9780750319423 Physics of the Lorentz Group, Second ... Kim focused his research on quantum mechanics in Einstein's relativistic world, particle theory, and optical sciences. He has ...
Optical physics and devices. Thus his research has included extensive studies in basic studies in optical-excited and -probed ... The computational optical simulation work led to the founding of RSoft by Robert Scarmozzino, a major integrated optical ... and optical new linear device. His work in nonlinear Si photonics with his students and Jerry Dadap and Nicolae Panoiu is ... Journal of the Optical Society of America A. The Optical Society. 8 (5): 724. Bibcode:1991JOSAA...8..724S. doi:10.1364/josaa. ...
Ultraviolet radiation, Military optical devices). ... An optical filter can be used to block out visible light and ... Wang, Baohua; Wang, Yuanyuan; Zhong, Xiaoming; Ruan, Ningjuan (20 February 2015). "Research on solar-blind UV optical imaging ... "Crystals of the simple and complex nickel and cobalt sulfates as optical filters for the solar-blind technology". Russian ... Ultraviolet illumination can be produced from longer wavelengths using non-linear optical materials. These can be a second ...
Optical devices, Physical chemistry, Spectroscopy). ... The output of the cell is the input of an optical detector (a ... "LONG PATH GAS CELLS". White, John (1942). "Long Optical Paths of Large Aperture". Journal of the Optical Society of America. 32 ... Robert, Claude (2007). "Simple, stable, and compact multiple-reflection optical cell for very long optical paths". Applied ... Optical density Optical depth Reflectivity White; Tittel (2002). "Tunable infrared laser spectroscopy". Annual Reports on the ...
"Optical Encoding Methods and Device". United States Patent. Retrieved 14 February 2012. Hawkins, Jeff. "Display Output Rotation ... a pen-like tool to aid with precision in a touchscreen device. The stylus was able to use handwriting-recognition software. The ...
... these devices are called optical klystrons. Instead of microwave cavities, these use devices called undulators. The electron ... When the device is turned on, electronic noise in the cavity is amplified by the tube and fed back from the output catcher to ... 122,123 Microwave Devices and Circuits, Dorling Kinderley, September 1990, p. 380, ISBN 978-81-7758-353-3 "V- 260, Tube V-260; ... Special overpacks are designed to help limit this field "in the field," and thus allow such devices to be transported safely. ...
"Photonic bandgap quasi-crystals for integrated WDM devices". Optical Devices for Fiber Communication IV. Vol. 4989. ... The devices are fabricated on standard wafers; one of typical devices is presented below (from the NOD web site). While the ... a typical device size of DPH devices is on the millimeter scale. The small footprint of the DPH makes it possible to combine ... Nano-Optic Devices, LLC (NOD) developed the DPH technology and applied it for commercializing nano-spectrometers. There are ...
Dodgson, Neil A. (20 March 2013). "Optical devices: 3D without the glasses". Nature. 495 (7441): 316-317. Bibcode:2013Natur.495 ...
"Analytical Approaches to the Description of Optical Microresonator Devices". AIP Conference Proceedings. 709 (1): 48-71. ... To understand how optical ring resonators work, we must first understand the optical path length difference (OPD) of a ring ... Optical ring resonators work on the principles behind total internal reflection, constructive interference, and optical ... it is possible to create high-order optical filters by cascading many optical ring resonators in series. This would allow for " ...
British Museum entry Oldest Optical Device? The Nimrud Lens 36°05′57″N 43°19′39″E / 36.0992°N 43.3275°E / 36.0992; 43.3275 ( ... The function of the lens is not clear, with some authors suggesting that it was used as an optical lens and others suggesting a ... doubting that the optical quality of the lens is sufficient to be of much use. The ancient Assyrians saw the planet Saturn as a ... and that there is no evidence that the Assyrians used lenses for their optical qualities, e.g. for magnification, telescopy or ...
Optical devices, Michael Faraday, Magneto-optic effects). ... Faraday rotation is a rare example of non-reciprocal optical ... this is the basis of optical isolators used to prevent undesired reflections from disrupting an upstream optical system ( ... Thus it is an example of circular birefringence, as is optical activity, but involves a material only having this property in ... is rotated as the wave traverses the device, which is explained by a slight difference in the phase velocity between the left ...
Various tactical optical devices are also allowed. Many VA Police Departments have contracted with Windham Weaponry for their ...
It has applications in acousto-optical devices. A very rare mineral form is called kuzminite and has the chemical formula Hg2( ...
"Optical Fiber Amplifiers: Materials, Devices and Applications." Artech House 1997. P 601 Markoff, John (March 3, 1997). "Fiber- ... This optical networking technology exploded the capacity of the Internet beginning in 1996 with the launch of the first high- ... Known as a steam jack, a similar device for rotating a spit was also later described by John Wilkins in 1648. While medieval ... In Roman Egypt, the inventor Hero of Alexandria was the first to experiment with a wind-powered mechanical device (see Heron's ...
Sudo, Shoichi (1997). Optical Fiber Amplifiers: Materials Devices, and Applications. Artech House, Inc. pp. xi. George, Gilder ... optical amplification and optical networking in the mid-1990s led to record data transfer rates. By 2018, optical networks ... Optical communication plays a crucial role in communication networks. Optical communication provides the transmission backbone ... The two core technologies are the optical fiber and light amplification (the optical amplifier). In 1953, Bram van Heel ...
These methods include mechanical and optical devices. Mechanical devices for sniffing measurements are piezo foils placed under ... The basic principles of operation are shared between the temperature and pressure devices. Inhalation of ambient air provides ...