the two bodies is needed for the energy transfer. One classification of infrared heaters is by the wavelength bands of infrared emission. Short wave or nearinfrared for the range from 780 nm ... 95 . Types Infrared heaters are commonly used in infrared modules or emitter banks combining several heaters to achieve larger heated areas. Infrared heaters are usually classified by the wavelength they emit. Nearinfrared NIR or short wave infrared heaters operate at high filament temperatures ..., quartz or high watt ceramic emitters, which emit near and medium infrared radiation, heat and light ... heating of the Fused quartz quartz material, 97 of the nearinfrared is absorbed by the silica ...An infrared heater is a body with a higher temperature which transfers energy to a body with a lower ... of the infrared radiation ranges from 780 nm to 1 mm. The relationship between ... infrared for the range between 1400 nm and 3000 nm Far infrared or dark emitters for everything above 3000 nm. File Carbon heater.jpg thumb right A household infrared electric heater Elements Infrared heaters use either a fuel to heat an emitter, or an electrically heated Electrical filament filament as the emitting body. An infrared lamp will protect the filament with a heat ... infrared heaters is tungsten wire, which is coiled to provide more surface area. Low temperature ... a comparable medium wave heater based on a FeCrAl filament. Industrial infrared heaters sometimes use a gold coating on the quartz tube that reflects the infrared radiation and directs it towards the product to be heated. Consequently the infrared radiation impinging on the product is virtually doubled ... wave and carbon CIR infrared heaters operate at filament temperatures of around 1000 C. They reach maximum power densities of up to 60 kW m medium wave and 150 kW m CIR . Far infrared emitters FIR are typically used in the so called low temperature far infrared sauna s. These constitute ... more details
title Transformation optics that mimics the system outside a Schwarzschild black hole year 2010 pages ...electromagnetism Transformation optics represents an advancement in the design of optical devices. It is the basis ... underpinning transformation optics is similar to the equations that describe how gravity warps space ... Transformation Optics May Usher in a Host of Radical Advances newspaper Azonano Nanotechnology pages ... ref name nano oct 2008 Cite news title Transformation Optics May Usher in a Host of Radical Advances ...?newsID 8164 accessdate 2010 05 24 ref Coordinate transformations Transformation optics has its ... coordinate system Cartesian mesh. Twisting the Cartesian mesh, in essence, transforms the coordinates ... papers, transformation optics is born. Cite news title Transformation Optics May Usher in a Host of Radical ... news.asp?newsID 8164 accessdate 2010 05 24 ref Transformation optics subscribes to the capability ..., for a desired application. Maxwell s equations do not vary even though coordinate system coordinates ... time period. Transformation optics developed from the capability to choose which parameters for a given ... flexible Gradient index optics gradient index material. Conventionally predetermined refractive ..., transformation optics is a new method for creating novel and unique optical device s. ref ... Optics publisher Imperial College, London year 2006 url http www.cmth.ph.ic.ac.uk photonics ... first David coauthors David Smith and Steve Cummer title Transformation Optics and Cloaking publisher ... transformation optics and cloaking accessdate 2010 05 24 ref Transformation optics can go beyond ... effective. Currently transformation optics is a field of optical and material engineering and science ... optics Developments in this field focus on advances in research of transformation optics. Transformation optics is the foundation for exploring a diverse set of theoretical , numerical simulation ... Gallium Indium Arsenide Phosphide GaInAsP , operated in the infrared spectral range and featured a high ... more details
Cleanup date June 2011 unreferenced date December 2008 Infrared thermometers infer temperature using a portion of the thermal radiation sometimes called blackbody radiation emitted by the object of measurement .... By knowing the amount of infrared energy emitted by the object and its emissivity , the object s temperature ... Thermal Radiation Thermometers or Radiation Thermometer for short. Sometimes, especially near ambient ... of the two possibilities. The most basic design consists of a lens to focus the infrared .... As such, the infrared thermometer is useful for measuring temperature under circumstances ... a significant temperature gradient on the object s surface. Infrared thermometers can be used ... varieties of infrared temperature sensing devices available today, including configurations designed ... to the surface, if the allowed measurement error is acceptable. The most common infrared thermometers are the Spot Infrared Thermometer or Infrared Pyrometer , which measures the temperature at a spot ..., although not strictly thermometers, includes Infrared Scanning Systems scan a larger area, typically ... exiting an oven, fabric and paper, or continuous piles of material along a conveyor belt. Infrared Thermal Imaging Cameras or Thermographic camera Infrared Cameras are essentially infrared radiation .... A photographic camera using infrared film and suitable lens, etc., is also called an infrared camera .... Image Infrared thermometer.JPG An IR thermometer in use in industry gallery External links Commons category Thermography http www.irinfo.org IRINFO.ORG The Definitive Online Resource for Infrared Thermography ... Introduction to Infrared Thermometers Omega http www.irapps.com Applications of Infrared Thermometers ... 1990s http www.tempsensornews.com News of infrared and thermal imaging products & services with dedicated RSS newsfeeds See also Infrared camera Thermography ASTM Subcommittee E20.02 on Radiation Thermometry Sakuma Hattori equation List of laser articles DEFAULTSORT Infrared Thermometer Category Thermometers ... more details
Infrared may mean The infrared range of light. Infrared spectroscopy subset of spectroscopy Infrared record label , a UK based record label. Infra Red song , a song by the band Placebo band Placebo . Disambig ... more details
Infrared Mammography is a specific form of breast thermography. The term was trademarked in 2011 by Infrared Medical Solutions and refers to the methods and standards used by Dr. Philip Hoekstra to perform breast thermography. Category Infrared imaging ... more details
low reflection surfaces. The ray optics field or current is generally not accurate near edges or shadow ...In physics , physical optics , or wave optics , is the branch of optics which studies Interference wave ... the ray approximation of geometric optics is not valid. This usage tends not to include effects ... theory . The physical optics approximation Physical optics is also the name of an approximation commonly used in optics, electrical engineering and applied physics . In this context, it is an intermediate method between geometric optics , which ignores wave effects, and full wave electromagnetism , which ... optics ray optics and not that it is an exact physical theory. This approximation consists of using ray optics to estimate the field on a surface and then integral integrating that field over the surface ... of the problem are treated as a perturbation theory perturbation . In optics, it is a standard ..., it is often more accurate in optics than for radio. In optics, it typically consists of integrating ... optics has some defects in the evaluation of the scattered fields. ref name Umul cite journal title Modified theory of physical optics first Y. Z. last Umul journal Optics Express month October ... optics, are incorrect. In 2004, Y. Z. Umul has introduced an improved theory that leads to the exact ... surface normal vectors in the physical optics journal Antennas and Propagation, IEEE Transactions ... 2008ITAP...56.3714S ref See also Electromagnetic modeling History of optics Negative index metamaterials ..., S. Yu title Physical Optics publisher Oxford University Press year 1997 isbn 0 19 851795 5 cite journal title A double edge diffraction Gaussian series method for efficient physical optics analysis ... 2597 cite journal title The physical optics method in electromagnetic scattering first J. S. last ... 299 doi 10.1063 1.524413 bibcode 1980JMP....21..290A references Category Optics Category Physical optics Category Electrical engineering bg de Wellenoptik es ptica f sica fr Optique ... more details
Journal of Optics may refer to Journal of Optics IOP Publishing Journal of Optics IOP Publishing ISSN 2040 8978 , a journal published by IOP Publishing on behalf of the European Optical Society Journal of Optics A Pure and Applied Optics Journal of Optics B Quantum and Semiclassical Optics Journal of Optics Springer Journal of Optics Springer ISSN 0972 8821 , a journal published by Springer on behalf of the Optical Society of India Not to be confused with Journal of Modern Optics Journal of the Optical Society of America A Journal of the Optical Society of America B dab ... more details
Infrared cirrus are filamentary structures seen in infrared light. The name is given because the structure looks cloud like in appearance. First detected by the IRAS Infrared Astronomy Satellite at wavelengths of 60 and 100 micrometres. See also Cosmic infrared background radiation External links http arxiv.org abs astro ph 0507587 Molecular Hydrogen in Infrared Cirrus , Kristen Gillmon, J. Michael Shull, 2006 Abstract http arxiv.org pdf astro ph 0507587 PDF Paper http www.sofia.usra.edu Science science cases dowell v2.pdf The Physics of Infrared Cirrus , C. Darren Dowell, Roger H. Hildebrand, Alex Lazarian, Michael W. Werner, Ellen Zweibel DEFAULTSORT Infrared Cirrus Category Interstellar media astronomy stub de Infrarot Cirrus fr Cirrus infrarouge zh ... more details
telescope s, as well as all of the largest telescopes built in the last decade. Active optics is not to be confused with adaptiveoptics , which operates at a shorter timescale and corrects different .... Comparison with adaptiveoptics Active optics should not be confused with adaptiveoptics , which ... deformation. The influences that active optics compensate temperature, gravity are intrinsically slower 1 Hz and have a larger amplitude in aberration. Adaptiveoptics on the other hand corrects ... of this, adaptiveoptics uses smaller Deformable mirror corrective mirrors . This used to be a separate ... 2005 ref See also Adaptiveoptics faster technology for smaller aberrations. Telescope Active surface ... External links http www.eso.org aot introduction.html An introduction to active & adaptiveoptics ...Image GTC Active Optics Acutators.jpg thumb right Actuators of the active optics of the Gran Telescopio Canarias . Active optics is a technology used with reflecting telescope s developed in the 1980s, ref cite journal last Hardy first John W. title Active optics A new technology for the control of light ..., mechanical stress. Without active optics, the construction of 8 metre class telescopes is not possible ..., O. B. Owner Petersen, M. Steenberg, K. title Active Optics on the Nordic Optical Telescope journal ... to move the actuators to obtain the best possible image is termed active optics . The name active optics means that the system keeps a mirror usually the primary in its optimal shape against all environmental ... axis deformation, et cetera. Active optics correct all factors that may affect image quality ... frequency , ref cite journal last Greenwood first Darryl P. title Bandwidth specification for adaptiveoptics systems journal Journal of the Optical Society of America year 1977 month March volume ..., Roberto Andrighettoni, Mario Martin, Hubert M title Adaptive secondary mirrors for the Large Binocular Telescope journal Proceedings of the SPIE year 2003 month February volume 4839 series Adaptive ... more details
Image Loupe binoculaire p1030891.jpg thumb right Several objective lenses on a microscope. In an optics optical instrument, the objective is the optical element that gathers light from the object being observed and focuses the ray optics light rays to produce a real image . Objectives can be single Lens optics lenses or mirror s, or combinations of several optical elements. They are used in microscope s, telescope s, camera s, slide projector s, CD player s and many other optical instruments. Objectives are also called object lenses , object glasses , or objective glasses . Types Microscope The objective lens of a microscope is the one at the bottom near the sample. At its simplest it is a very high powered magnifying glass , with very short focal length . This is brought very close to the specimen being examined so that the light from the specimen comes to a focus inside the microscope tube. The objective itself is usually a cylinder containing one or more lenses that are typically made of glass its function is to collect light from the sample. A typical microscope has several objective lenses with different focal lengths screwed into a circular nose piece which may be rotated to select the required lens. The lenses are typically designed to be Parfocal lens parfocal , which means that when one changes from one to another the sample stays in focus optics focus . Microscope objectives are characterized by two parameters magnification and numerical aperture . The former typically ranges from 4 to 100 , while the latter ranges from 0.10 to 1.25, corresponding to focal lengths of about 40 to 2 mm, respectively. For high magnification applications, an oil immersion objective or water immersion objective has to be used. The objective is specially designed and Index matching material refractive index matching oil or water must fill the air gap between the front element ... or the image forming primary mirror of a Reflecting telescope reflecting or Catadioptric system ... more details
. The total heating effect of infrared radiation as measured by thermometers led to development ... known as photometric and radiometric quantities. Every quantity in one system has an analogous quantity in the other system. Some examples of parallel quantities include ref name Bass95 Luminance ... , but as a light source it puts out very few lumens because most of the energy is in the infrared ... through the lamp base . The remainder is emitted as radiation, mostly in the infrared . Thus ... is invisible infrared. A compact fluorescent lamp can provide light comparable to a 60 watt incandescent ... on the wavelength according to how visible the wavelength is. Infrared and ultraviolet radiation, for example, are invisible and do not count. One watt of infrared radiation which is where most ... use a motorized system of mirrors to reflect light emanating from the luminaire in all directions ... . DEFAULTSORT Photometry Optics Category Photometry Category Lighting ar be be x ... more details
and the Moon when near the horizon . Through his extensive research on optics, he has been hailed ...Multiple issues unbalanced June 2010 disputed July 2009 The Book of Optics lang ar Kit b al Man ir ... Arabis Italian language Italian Deli Aspecti was a seven volume treatise on optics , Islamic physics ... influence on the History of optics development of optics , as it laid the foundations for modern physical optics after drastically transforming the way in which light and Visual perception vision had ... . Ibn al Haytham has been called the father of modern optics , ref name Verma R. L. Verma 1969 . Al Hazen father of modern optics . ref the pioneer of the modern scientific method, ref name Gorini ... The Book of Optics has been ranked alongside Isaac Newton s Philosophiae Naturalis Principia Mathematica ... Revolution revolution in the fields of optics and visual perception , ref name Sabra citation last1 ... of proof in optics, ref name Gorini and gave optics a physico mathematical conception at a much ... Science of Optics in the Seventeenth Century publisher Springer Science Business Media Springer ... mathematical conception of optics was established at a much earlier time than would be the case in the other mathematical sciences. ref The Book of Optics also contains the earliest discussions and descriptions ... of the Book of OpticsOptics and vision In classical antiquity , there were two major theories ... Ray optics rays of light . The second theory, the intromission theory, supported by Aristotle and his ... His unification of geometrical optics with Aristotelian physics philosophical physics forms the basis of modern optics. ref Citation last Toomer first G. J. authorlink G. J. Toomer date December 1964 ... lines, and carried out a number of experiments with lens optics lens es, mirror s, refraction , and Reflection physics reflection . ref name Deek Dr. Mahmoud Al Deek. Ibn Al Haitham Master of Optics ... development in geometric optics. ref Albrecht Heeffer. http logica.UGent.be albrecht ... more details
Other uses Prism disambiguation File Prism side fs PNr 0117.jpg thumb upright right A plastic prism In optics , a prism is a transparent optical element with flat, polished surfaces that refraction refract light . The exact angles between the surfaces depend on the application. The traditional geometrical shape is that of a triangular prism with a triangular base and rectangular sides, and in colloquial use prism usually refers to this type. Some types of optical prism are not in fact in the shape of prism geometry geometric prisms . Prisms can be made from any material that is transparent to the wavelength s for which they are designed. Typical materials include glass , plastic and Fluorite Optics fluorite . A prism can be used to break light up into its constituent spectrum spectral color s the colors of the rainbow . Prisms can also be used to reflection physics reflect light, or to split light into components with different polarization waves polarization s. How prisms work Image Light dispersion conceptual waves.gif thumb 330px A triangular prism, dispersing light waves shown to illustrate ... or color of the light used, a phenomenon known as dispersion optics dispersion . This causes ... indicate the ray angles after refraction. Ray optics Ray angle deviation and dispersion through ... prism optics Triangular prism Abbe prism Pellin Broca prism Amici prism Compound prism Grating and prism ... res handbook Handbook of Optics . Vol. 2, Ch. 5. McGraw Hill. ref Paschen Runge mounting Paschen Runge Eagle mounting Eagle Wadsworth constant deviation system Wadsworth Ebert Fasti mounting Ebert Fasti ... 1.1556393 author B.D. Duncan et al. title Wide angle achromatic prism beam steering for infrared countermeasure ... TechnicalGuide Fundamental Optics.pdf Fundamental Optics CVI Melles Griot Further Reading cite book author Hecht, Eugene title Optics edition 4th publisher Pearson Education year 2001 isbn 0 8053 8566 ... sq Prizmi optik si simple Prism optics sk Optick hranol sl Opti na ... more details
Cleanup date October 2010 Optical aberration In optics , piston is the mean value of a wavefront or Phase waves phase profile across the pupil of an optical system. The piston coefficient is typically expressed in wavelength s of light at a particular wavelength . Its main use is in curve fitting wavefronts with Cartesian polynomials or Zernike polynomials . However, similar to a real V8 engine piston moving up and down in its cylinder, optical piston values can be changed to Bias electrical engineering bias the wavefront phase mean value as desired. As phase values can only vary from zero to 2 , then repeat in either direction termed phase wrapping , changing the piston coefficient changes the zero phase value contour locations across the wavefront. This property is critical to the operation of phase measuring interferometers , which give not only the magnitude but also the sign wikt convexity convexity or wikt concave concavity of a wavefront under test. Piston is physically created in the interferometer by piezoelectric actuators that translate the Fizeau interferometer reference surface along the optical axis by precise fractions of the test wavelength, usually by one quarter of a wavelength. This changes the interferometric fringe patterns and allows direct calculation of the exact wavefront error. Piston and Tilt optics tilt are not actually true optical aberration optics aberrations , as they do not represent or model curvature in the wavefront. Defocus is the lowest order true optical aberration. If piston and tilt are subtracted from an otherwise perfect wavefront, a perfect, aberration free image is formed. References Malacara, D., Optical Shop Testing Second Edition , John Wiley and Sons, 1992, ISBN 978 0 471 52232 4. DEFAULTSORT Piston Optics Category Optics ... more details
Nonlinear optics NLO is the branch of optics that describes the behavior of light in nonlinear media ... 10 sup 8 sup V m such as those provided by pulsed laser s. In nonlinear optics, the superposition principle no longer holds. Nonlinear optics remained unexplored until the discovery of Second harmonic ... in 1961 Nonlinear optical processes Nonlinear optics gives rise to a host of optical phenomena ... index Soliton optics Optical solitons , An equilibrium solution for either an Optical pulses ... to a single electron Multiple photoionisation , near simultaneous removal of many bound electrons ... optics , the refractive index is affected by acoustic waves ultrasound used in acousto optic modulator ... effects fall into two qualitatively different categories, Parametric process optics parametric ... Processes, Nonlinear Optics by Robert W. Boyd physicist Robert W. Boyd 3rd ed. , pp. 13 15. ref ... from Han Kwang Nienhuys s PhD thesis Femtosecond mid infrared spectroscopy of water 2002 .... ref Robert W. Boyd, Nonlinear optics, Third edition, Chapter 2.3. ref The above ignores the position ... axes o see crystal optics . There are several schemes of choosing the polarizations for this crystal ..., cells, and gas filled capillary waveguides. Example uses of nonlinear optics Frequency doubling One ... resistant against the high intensity laser light. However, Organic nonlinear optics organic polymeric ... waves that phase up as the time reversed beam. In the language of nonlinear optics, the interacting ... Filament propagation Category Nonlinear optical materials Parametric process optics Notes Reflist References cite book title Nonlinear Optics edition 3rd last Boyd first Robert authorlink Robert W. Boyd ... Optics Third Robert Boyd dp 0123694701 ref sr 1 1?ie UTF8&qid 1313111421&sr 8 1 cite book title The Principles of Nonlinear Optics last Shen first Yuen Ron authorlink Yuen Ron Shen year 2002 publisher Wiley Interscience isbn 978 0471430803 url http www.amazon.com Principles Nonlinear Optics Classics ... more details
of lens are ambiguous with lens optics . File BiconvexLens.jpg thumb right 250px A lens. File Lens and wavefronts.gif right frame Lenses can be used to focus light. A lens is an optics optical device ... with a single element. Lenses are typically made of glass or transparency optics transparent ... lense History expand section history after 1758 date January 2012 See also History of optics Camera ... optics focus the sun s rays to produce fire . Some scholars argue that the archeological evidence ..., these were primitive Lens optics Types of simple lenses plano convex lenses initially made by cutting ... than standard simple lenses. These in turn evolved into freeform digital adaptive corrected curve ... convention of lens radii R sub 1 sub and R sub 2 sub Main Radius of curvature optics The signs of the lens ... axis to a spot known as the Focus optics focal point at a distance f from the lens. Conversely ..., but S sub 1 sub and S sub 2 sub are interpreted differently. If the system is in air or vacuum , S sub 1 sub and S sub 2 sub are measured from the front and rear principal plane s of the system ... the image to be an imperfect replica of the object. Careful design of the lens system for a particular ... is coma optics coma , which derives its name from the comet like appearance of the aberrated image ... is caused by the dispersion optics dispersion of the lens material the variation of its refractive ... step in the development of the optical microscope. An apochromat is a lens or lens system ... than the focal length of the first lens , the focal length for the combined system is given by math ... a parallel collimated beam into another collimated beam. This type of system is called an afocal system , since it produces no net convergence or divergence of the beam. Two lenses at this separation form the simplest type of optical telescope . Although the system does not alter the divergence ... system where the lenses spherical aberration corrects the opposite aberration in the mirror ... more details
See also Huygens Fresnel principle geometrical optics Fourier optics is the study of classical optics ... slit experiment . In Fourier optics, by contrast, the wave is regarded as a superposition of plane waves ... center. In the near field, no single well defined spherical wave phase center exists, so the wavefront ... spherical wave sources in space. In the near field, a full spectrum of plane waves is necessary to represent the Fresnel near field wave, even locally . A wide wave moving forward like an expanding ... optics forms much of the theory behind image processing image processing techniques , as well ... optics . To put it in a slightly more complex way, similar to the concept of frequency and Time in physics time used in traditional Fourier transform Fourier transform theory , Fourier optics makes ... time. The Wave Equation in the Time Domain Fourier optics begins with the homogeneous, scalar .... The plane wave spectrum the foundation of Fourier optics Fourier optics is somewhat different from ordinary ray optics typically used in the analysis and design of focused imaging systems such as cameras, telescopes and microscopes. Ray optics is the very first type of optics most of us encounter ... understanding of common optical devices. Unfortunately, ray optics does not explain the operation of Fourier optical systems, which are in general not focused systems. Ray optics is a subset of wave optics in the jargon, it is the asymptotic zero wavelength limit of wave optics and therefore ... to encompass wave optics, in which the optical field is seen as a solution to Maxwell s equations. This more general wave optics accurately explains the operation of Fourier optics devices. In this section ... Fourier optics. The plane wave spectrum concept is the basic foundation of Fourier Optics ... to produce a sharp spot in an optical system see discussion related to Point spread function . The plane ... waveguide modes, optical fiber modes, Soliton optics solitons and Bloch wave s. Infinite homogeneous ... more details
potential, defined only by one factor, the wavelength. The importance of the infrared atmospheric ... 3 21 1 26. ref Nowadays, accurate line by line computations are possible, and careful studies of the infrared atmospheric window have been published. Kinetics of the infrared atmospheric window The infrared ... spectral window. Mechanisms in the infrared atmospheric window The infrared absorptions of the principal .... 1972 . The Nimbus 4 infrared spectroscopy experiment. 1. Calibrated thermal emission spectra. Journal ... in far infrared spectral lines between about 16 and 28 m. Clouds are excellent emitters of infrared radiation. Window radiation from cloud tops arises at altitudes where the air temperature ... CA, ISBN 9780495555735. ref . Importance for life Without the infrared atmospheric window, the Earth ... as Venus did early in solar system history. Thus, the existence of an atmospheric window is critical ... of the infrared atmospheric window has become threatened by the development of highly unreactive ... tutorial irwindows.html IR Atmospheric Window DEFAULTSORT Infrared Window Category Atmosphere Atmospheric ... more details
in the nearinfrared because water absorbs solar radiation at those wavelengths . Halo Main Halo optical ... . Atmospheric optics deals with how the unique optical properties of the Earth s atmosphere cause ... higher in the sky Main Moon illusion In the Book of Optics 1011 1022 A.D. , Ibn al Haytham argued ... Image gradient gradient dark in the zenith , light near the horizon. Light that comes in from overhead ... Fundamentals of Atmospheric Optics author Yu Timofeev and A. V. Vasil ev page 174 date 2008 05 01 accessdate ... The sky can turn a multitude of colors such as red, orange, purple and yellow especially near sunset ... crystals creating colored or white arcs and spots in the sky. ref name 1842diction Many are near the sun ... refracted by the ice crystals and may split into colors because of dispersion optics dispersion . The crystals behave like prism optics prism s and mirror s, refracting and reflecting sunlight ... them. ref cite book url http books.google.com ?id rF4MAAAAYAAJ&pg PA206&dq glory fog optics degree angle ...&pg PA330&dq optics sundog coloration book v onepage&q&f false title A world of weather fundamentals ...&dq optics sundog cause ice book v onepage&q&f false page 43 title Fundamentals Of Optics author Devaraj ... halo dogalt.htm title Effect of solar altitude publisher Atmospheric Optics accessdate ... Optics accessdate 2011 04 01 date 2009 08 02 author Les Cowley ref clear Glory Image Solar ... . A rainbow is an optics optical and meteorology meteorological phenomenon that causes a optical ... would need to be in an airplane or near a mountaintop since the rainbow would otherwise be below ... common near afternoon thunderstorm s during the summer . ref name mac cite book url http books.google.com ... can rest over colder dense air, forming an atmospheric duct which acts like a refracting lens optics ... induced crepuscular rays in San Francisco Main Crepuscular rays Crepuscular ray s are near ... the horizon. These are often mistaken for light pillar s. They are commonly seen near sunrise and sunset ... more details
Infobox company company name Net Optics, Inc. logo Image NetOptics.jpg 240px company type Private Company foundation 1996 company slogan Customer First location Santa Clara, California key people Eldad Matityahu, Board Chairman br Bob Shaw, President & CEO products Network tap s, Bypass Switch es, Media Converters, Link aggregation Aggregation Tap s, Regeneration Tap s, data monitoring switch es homepage http www.netoptics.com www.netoptics.com Net Optics is a manufacturer of network monitoring and intelligent ... and reseller networks. Net Optics is a private company and supports approximately 6,300 customers ... read 378274.htm Sys Con Media.com Net Optics, Inc. Introduces iBypass for Fail Safe IPS Security ...?DocNumber 208291 The Tolly Group Net Optics 10 100 1000 iBypass Switch Evaluation ref The bypass switch ... time a system administrator does performance tuning. Aggregators Aggregators are taps that copy ... on multiple monitoring ports. Data monitoring switches Deleted image removed Image Net Optics Director.PNG 400px thumb Net Optics Data monitoring switch , Director sup TM sup deletable image ... types may include copper, multimode fiber, and singlemode fiber. For example, Net Optics media converters ... Optics products include iTap technology, which provides the ability to remotely manage devices through ... security id 1177970450.html Enterprise IT Planet.com Net Optics Taps 3. http www.processor.com ... Net Optics, Inc. Introduces iBypass for Fail Safe IPS Security Deployments 5. http www.tolly.com DocDetail.aspx?DocNumber 208291 The Tolly Group Net Optics 10 100 1000 iBypass Switch Evaluation ... 1663 The Network Encyclopedia Media Converter references External links http www.netoptics.com Net Optics website http www.lovemytool.com blog 2008 04 bob shaw.html Interview with Net Optics CEO Bob Shaw ... Optics, Oracle, Intel http products.datamation.com networking lan 1177970450.html Summary of Products Net Optics Category Manufacturing companies Category Networking hardware Category Companies established ... more details
Refimprove date January 2008 Infrared cleaning is a technique used by some film scanner s and flatbed scanner s to reduce or remove the effect of dust and scratches upon the finished image scanning scan . It works by collecting an additional infrared channel from the scan at the same position and resolution as the three visible colour channels red, green, and blue . This infrared channel can be used to automatically remove the appearance of dust and scratches in the visible channels and replace them by inpainting . Approaches Scanners use three different techniques for doing this Nikon film scanners ... infrared light source. At each scan position, the scanner uses an RGB linear array to scan the film in RGB and RGB Infrared. This is as fast as the Nikon approach, since only one physical pass over ..., an RGB light source and an infrared light source. These scanners make two passes over the film once for RGB and once for infrared. This is slower than the Nikon or Minolta approach, since two passes ... quality. Applicability The three color dyes in modern color film emulsions respond equally to infrared light, so the infrared image looks relatively opaque compared to the RGB image. Any dust spots or scratches appear as dark spots in infrared, making it easy to find and correct for these dust spots. Kodachrome film dyes are more sensitive to infrared than Ektachrome film dyes, making it more ... s ref http www.silverfast.com highlights isrd en.html ref , claim to use infrared cleaning to find dust spots even when scanning Kodachrome. Infrared cleaning doesn t work at all with silver halide ... particles respond equally in visible light and infrared light . History IBM originally developed and patented infrared cleaning, and subsequently licensed this patent to Applied Science Fiction ASF . Canon has a patent cross licensing agreement with IBM and was able to use the IBM s infrared cleaning ... developed infrared cleaning algorithms which are completely different from IBM s patented ... more details
Infobox Film see Template Infobox film name Infrared Sightings image GDInfraredSightingsVHS.jpg caption Infrared Sightings video tape cover director Len Dell Amico br Larry Lachman producer Len Dell Amico br Larry Lachman music Grateful Dead distributor Trigon Productions released 1992 runtime 18 minutes country United States language English Infrared Sightings is a video by the Grateful Dead , consisting of computer animation and other imagery set to music from their album Infrared Roses . It was released on VHS video tape and on laserdisc in 1992 in film 1992 , and is 18 minutes long. Infrared Roses is known to fans as the all Drums and Space album . Produced by Grateful Dead sound designer Bob Bralove, it contains free form musical improvisation improvisational music recorded live at a number of different Dead concerts. The visuals for Infrared Sightings combine computer generated images, many of them abstract art abstract , with found footage that has been altered or edited in various ways. The video is therefore somewhat reminiscent of the light shows that were projected on large screens at many Grateful Dead concerts. Infrared Sightings on Allmovie The Allmovie entry for Infrared Sightings http allmovie.com cg avg.dll?p avg&sql 1 178339 erroneously states that the video includes the songs Truckin , Playing in the Band , Not Fade Away song Not Fade Away , Sugar Magnolia , and Friend of the Devil . As explained above, the soundtrack of Infrared Sightings actually is made up of sections of different performances of the free form musical improvisation known as Drums and Space ... Highrise Table Top Stomp part 3 Yes I Kandinsky music Infrared Roses Credits Musicians Jerry Garcia ... movie 178339 http www.deaddisc.com vi Infrared.htm Infrared Sightings at the Grateful Dead Family Database http www.lddb.com laserdisc.php?id 4389 Infrared Sightings at LaserDisc Database Scott, John ... Clip from Infrared Sightings on FritzPerlberg.com Grateful Dead Category Grateful Dead Category ... more details
tracking imperfectly manufactured optics imperfectly assembled components movements of the system ... display system s and luminaire s. When compared to traditional design techniques, nonimaging optics ...Nonimaging optics also called anidolic optics ref name NIO Roland Winston et al.,, Nonimaging Optics ... to Nonimaging Optics , CRC Press, 2008 ISBN 978 1 4200 5429 3 ref is the branch of optics concerned ... optics, the techniques involved do not attempt to form an image of the source instead an optimized optical system for optical radiative transfer from a source to a target is desired. Applications The two design problems that nonimaging optics solves better than imaging optics are ref William J. Cassarly, Taming light using nonimaging optics , SPIE Proceedings Vol. 5185, Nonimaging Optics Maximum ... on the target side of the optical system often must be optimized while simultaneously considering the collection efficiency of the optical system at the source. Solar energy concentration For a given concentration, nonimaging optics provide the widest possible Acceptance angle solar concentrator ... to traditional imaging optics such as parabolic reflector s or fresnel lens es , the main advantages of nonimaging optics for concentrating solar energy are wider Acceptance angle solar concentrator ... radiation other imperfections in the system higher solar concentrations smaller solar cells in concentrated ... kinds of optics with different geometries can be tailored for different applications Also, for low concentrations, the very wide Acceptance angle solar concentrator acceptance angles of nonimaging optics ... disadvantage of nonimaging optics when compared to parabolic reflector s or fresnel lens es is that, for high .... That, however, is only noticeable when the optics are aiming perfectly towards the sun, which is typically not the case because of imperfections in practical systems. Illumination optics Examples of nonimaging optical devices include optical waveguide optics light guide s, nonimaging mirror ... more details
Refimprove date December 2007 Cleanup date December 2009 An infrared blaster or IR blaster is a device that emulates an infrared remote control to autonomously control a device that is normally controlled only by remote control key presses. The most common use of an IR blaster is to allow a recording device such as a digital video recorder DVR or video cassette recorder VCR to change the channel on an external tuner such as a cable box or satellite receiver. This way, the recording device can automatically select the correct channel to record before starting the recording process. Another common use is to extend infrared signals in order to place remote controlled products behind closed doors. gallery Image tivo irblaster small.jpg Example IR Blaster with standard 1 8 plug Image Ir blaster on cable box.jpg IR Blaster stuck to a cable tv tuner gallery References http www.mythtv.org wiki IR Blaster Using an IR Blaster with MythTV Unreferenced date March 2010 references Category Infrared technology tech stub ... more details
An infrared excess is a measurement of an astronomical source, typically a star , that has a greater measured infrared radiative flux flux than expected by assuming the star is a blackbody radiation blackbody radiator . Infrared excesses are often the result of circumstellar dust and are common in young stellar object s and evolved stars on the asymptotic giant branch or Post AGB older . References cite book last Evans first Aneurin title The Dusty Universe publisher Ellis Horwood date 1993 pages 155 165 Category Observational astronomy astronomy stub de Infrarotexzess lb Infraroutexzess sk Infra erven prebytok zh ... more details
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