Optical wireless is the combined use of opticaloptical fiber optical fibre and wireless radio radio frequency communication to provide telecommunications telecommunication to clusters of end points which are geographically distant. The high capacity optical fibre is used to span the longest distances, and a lower cost wireless link carries the signal for the last mile to nearby users. Sources http searchmobilecomputing.techtarget.com sDefinition 0,,sid40 gci760820,00.html Definition Optical Wireless , SearchMobileComputuing website. Optical communication Telecommunications telecom stub Category Optical communications Category Local loop ... more details
Unreferenced date December 2009 The path that light takes in traversing an optical system is often called the optical path . The physical length of an optical device can be reduced to less than the length of the optical path by using folded optics . The optical path length as defined in optics is the length of the path multiplied by the index of refraction of the medium. See also Optical path length DEFAULTSORT Optical path Category Optics Optics stub de Strahlengang it Cammino ottico sv Str lg ng ... more details
Unreferenced date December 2009 An optical link is a communications link that consists of a single end to end optical circuit. A cable of optical fiber , possibly concatenated into a dark fiber link, is the simplest form of an optical link. Other forms of optical link can include single colour links over a wavelength division multiplex infrastructure, and or links that use optical amplifier s to compensate for attenuation over long distances. Other forms of optical links include free space optical communication links. Also in the railways optical is used in two forms depending upon the whether the feeding station is main or not. Thus for main stations it is sain to be long hall and for all remaining stations it is to be short hall. See also colbegin 3 Light Peak Optical interconnect Parallel optical interface Interconnect bottleneck Optical communication Optical cable Transimpedance amplifier Photo diode VCSEL PIN diode Green computing InfiniBand InfiniBand Trade Association Fibre channel HDMI PCI Express Active cables Small form factor pluggable transceiver Terabit Ethernet 100 Gigabit Ethernet 10 Gigabit Ethernet Optoelectronics Data center High performance computing Cloud computing CXP connector Active Cables C Form factor Pluggable Fiber optic communication List of device bandwidths colend DEFAULTSORT Optical Link Category Optical communications Telecom stub ... more details
Unreferenced date August 2009 Optical microspheres photonic atoms are high quality factor optical resonator s used for active and passive photonic applications such as microlaser cavities and filters. Category Optics optics stub ... more details
Optical networking can refer to Optical communication Fiber optic communication Synchronous optical networking Optical Transport Network OTN Passive optical network disambig Short pages monitor This long comment was added to the page to prevent it being listed on Special Shortpages. It and the accompanying monitoring template were generated via Template Longcomment. Please do not remove the monitor template without removing the comment as well. ... more details
unreferenced date September 2009 Image optical train.jpg thumb 250px right An optical train showing the arrangement and angle of lenses and mirrors to guide the laser. Optical train also called optical assembly is the arrangement of lens optics lenses to guide Line of sight propagation line of sight and lasers. The position and angle of lenses are adjusted to guide a laser through the path required. optics stub Category fiber optics ... more details
Mergeto diffraction limit date June 2009 Optical superresolution is a general term for optical techniques which operate beyond the normal diffraction limit . See also Super resolution Superoscillation Category Physical optics physics stub optics stub ... more details
Optical engineering is the field of study that focuses on applications of optics . Optical engineers design components of optical instrument s such as lens optics lenses , microscope s, telescope s, and other equipment that utilizes the properties of light . Other devices include optical sensors and measurement systems, laser s, fiber optic communication systems, optical disc systems e.g. CD , DVD , etc. Because optical engineers want to design and build devices that make light do something useful, they must understand and apply the science of optics in substantial detail, in order to know what is physically possible to achieve physics and chemistry . However, they also must know what is practical in terms of available technology, materials, costs, design methods, etc. As with other fields of engineering, computer s are important to many perhaps most optical engineers. They are used with instruments, for simulation, in design, and for many other applications. Engineers often use general computer tools such as spreadsheet s and programming language s, and they make frequent use of specialized optical software designed specifically for their field. Optical engineering metrology uses optical methods to measure micro vibrations with instruments like the laser speckle interferometer or to measure the properties of the various masses with instruments measuring refraction . See also Optical lens design Optician Optical physics SPIE Code V Zemax HEXAGON optical software References references Further reading Driggers, Ronald G. ed. 2003 . Encyclopedia of Optical Engineering. New York Marcel Dekker. 3 vols. ISBN 978 0824709402 Bruce H. Walker, Historical Review,SPIE Press, Bellingham, WA. ISBN 9780819478771. http link.aip.org link doi 10.1117 3.818136.ch2 FTS Yu & Xiangyang Yang 1997 Introduction to Optical Engineering , Cambridge University Press , ISBN 0251574935 . Technology footer Engineering stub Category Optics Category Engineering disciplines ar de Feinoptiker ... more details
Unreferenced stub auto yes date December 2009 File Optical Circulator symbol.jpg thumb Optical Circulator symbol An optical circulator is a special optical fiber fiber optic component that can be used to separate optical signals that travel in opposite directions in an optical fiber , analogous to the operation of an electronic circulator . An optical circulator is a three port device designed such that light entering any port exits from the next. This means that if light enters port 1 it is emitted from port 2, but if some of the emitted light is reflected back to the circulator, it does not come out of port 1, but instead exits from port 3. Circulators can be used to achieve bi directional transmission over a single fiber. Because of its high optical isolator isolation of the input and reflected optical powers and its low insertion loss , optical circulators are widely used in advanced fiber optic communications communication systems and fiber optic sensor applications. Optical circulators are non reciprocal optics, which means that changes in the properties of light passing through the device are not reversed when the light passes through in the opposite direction. This can only happen when the symmetry of the system is broken, for example by an external magnetic field . A Faraday rotator is another example of a non reciprocal optical device. See also Optical isolator http patft.uspto.gov netacgi nph Parser?Sect1 PTO2&Sect2 HITOFF&p 1&u 2Fnetahtml 2FPTO 2Fsearch adv.htm&r 1&f G&l 50&d PTXT&S1 5909310.PN.&OS pn 5909310&RS PN 5909310 US Patent 005909310 DEFAULTSORT Optical Circulator Category Optical devices Optics stub ca Circulador ptic ... more details
Image Optical Interleaver.gif thumb 400px right Illustration of the function of an optical interleaver and de interleaver An optical interleaver is a 3 port passive fiber optics fiber optic device that is used to combine two sets of dense wavelength division multiplexing DWDM channels odd and even channels into a composite signal stream in an interleaving way. For example, optical interleaver takes two multiplexed signals with 100 GHz spacing and interleaves them, creating a denser DWDM signal with channels spaced 50 GHz apart. The process can be repeated, creating even denser composite signals with 25 GHz or 12.5 GHz spacing. The device can be used in a reverse direction, forming an optical deinterleaver that separates a denser DWDM signal into odd channels and even channels. See schematic diagram. For example, in most DWDM equipment, the standard channel spacing is 100 GHz. But spacing the signal carrying frequencies every 50 or even 25 GHz can double or even quadruple the number of channels per fiber. Thus, optical interleaver can expand the number of channels per fiber, and devices and or networks can be upgraded without requiring that all devices be upgraded. Optical interleaver is based on multiple beam interference . Currently, there are two approaches to building optical interleaver 1 Step phase Michelson interferometer , and 2 birefringence Birefringent crystal networks. The former is based on Michelson interferometer combined with Gires Tournois interferometer . Image Interleaver Spectrum.jpg frame 622px center Transmission spectra of 50 100 GHz optical interleaver at three temperatures See also Optical add drop multiplexer External links http www.optoplex.com Optical Interleaver.htm Optical Interleaver for fiber optic communications Category Fiber optic communications Interleaver, optical Category Optical devices Interleaver, optical Category Photonics ... more details
For the optic axis of a crystal Optic axis of a crystal Image Optical axis en.png thumb 300px Optical axis coincides with red ray and rays symmetrical to optical axis pair of blue and pair of green rays propagating through different lenses. An optical axis is a line along which there is some degree of rotational symmetry in an optics optical system such as a camera lens or microscope . The optical axis is an imaginary line that defines the path along which light propagates through the system. For a system composed of simple lens optics lenses and mirror s, the axis passes through the center of curvature of each surface, and coincides with the axis of rotational symmetry . The optical axis is often coincident with the system s mechanical axis, but not always, as in the case of off axis optical system s. For an optical fiber , the optical axis is along the center of the fiber core , and is also known as the fiber axis . See also Ray optics Cardinal point optics Boresight References FS1037C DODDIC Category Geometrical optics de Optische Achse Optik et Optiline telg eo Optika akso ko id Sumbu optis it Asse ottico nl Optische as optica ja pl O optyczna ru sk Optick os sl Opti na os tr Optik eksen uk zh ... more details
Orphan date April 2010 Cleanup date April 2010 The Optical Wizard is an online automated lens calculator, invented by William Bridson and a group of engineers from Navitar Inc. in Rochester, NY . The Optical Wizard received a patent from the US government in 2006, as the first automated lens selection tool of its kind. The tool is utilized by optical, mechanical, and electrical engineers, along with researchers and physicists to find quick automated, calculation free solutions for machine vision , automation, testing, measuring, assembly, inspection, electronic, and biomedical imaging applications. It comprises the steps of generating a set of user requirements that include a set of data defining the user s optical imaging specification generating a second data set defining optical characteristics of each of a plurality of standardized optical devices generating a set of programmed instructions for comparing the first data set with the second data set and, using a programmed computer to automatically select a combination of the optical devices that function to essentially satisfy the user s optical imaging specifications. References http www.encyclopedia.com doc 1G1 157642196.html http patft.uspto.gov netacgi nph Parser?Sect1 PTO1&Sect2 HITOFF&d PALL&p 1&u 2Fnetahtml 2FPTO 2Fsrchnum.htm&r 1&f G&l 50&s1 7,149,662.PN.&OS PN 7,149,662&RS PN 7,149,662 http www.imveurope.com products product details.php?product id 858 http news.thomasnet.com fullstory 801216 External links http www.opticalwizard.com Optical Wizard Category Optical devices Category Web applications ... more details
Refimprove date May 2007 Optical communication is any form of telecommunication that uses light as the transmission medium . An optical communication system consists of a transmitter , which encodes a message into an optical signal information theory signal , a channel communications channel , which ... optical signal. Forms of optical communication File Bundesarchiv Bild 102 09520, Kieler Hafen, Abfahrt der Deutschen Hochseeflotte.jpg thumb Naval signal There are many forms of non technological optical ... s, ship flags , smoke signals , and beacon beacon fires were the earliest form of technological optical ... an Aldis lamp to communicate with planes whose radio failed. Free space optical communication is also used today in a variety of applications. Optical fiber communication Main article Fiber optic communication . Optical fiber is the most common type of channel for optical communications, however, other types of optical waveguide s are used Light Peak within computers or communications gear, and have ... trials. The transmitters in optical fiber links are generally light emitting diode s LEDs or laser diode s. Infrared light, rather than visible light is used more commonly, because optical fibers transmit ... optical phase and frequency modulation have been demonstrated in the lab. The need for periodic ... , which extended link distances at significantly lower cost. Free space optical communication Main article Free space optical communication . Free Space Optics FSO systems are generally employed for last ... Line of sight propagation line of sight between the source and the destination, and the optical ... of low data rate, short distance free space optical communications using LEDs. Other free space ... subsystems. ref cite web last Wilson first K. title Recent Development in High Data Rate Optical Communications ... Technical Reports Server accessdate 4 October 2011 ref See also Commons category Optical communication Laser Optical telegraph Heliograph Photophone Telegraph Jun Ichi Nishizawa an inventor of optical ... more details
Refimprove date December 2009 Optical storage is a term from engineering referring to the storage of data on an optically readable medium. Data is recorded by making marks in a pattern that can be read back with the aid of light , usually a beam of laser light precisely focused on a spinning disc. An older example, that does not require the use of computers, is microform . There are other means of optically storing data and new methods are in development. Optical storage differs from other computer data storage data storage techniques that make use of other technologies such as magnetism or semiconductor s. Optical storage can range from a single drive reading a single CD ROM to multiple drives reading multiple discs such as an optical jukebox . Single compact discs can hold around 700MB megabyte s and optical jukebox es can hold much more ref Compact Disc http en.wikipedia.org wiki Compact Disc ref . The term optical drive usually refers to a device in a computer that can read CD ROM s or other optical disc s. It is estimated that in the year 2007, optical storage represents 27 of the world s technological capacity to store information ref name HilbertLopez2011 http www.sciencemag.org content 332 6025 60 The World s Technological Capacity to Store, Communicate, and Compute Information , especially http www.sciencemag.org content suppl 2011 02 08 science.1200970.DC1 Hilbert SOM.pdf ... also Data storage device the broader topic of all devices that store data. Optical Media board disc modern optical discs such as CD ROM s and related formats. Optical Jukebox Optical disc drive Optical tape more capacity than magnetic tape but not as cost effective Magneto optical drive combines Optical ... data storage media. HDSS Holographic Data Storage Systems potential new optical storage technology. 3D optical data storage potential new optical storage technology. Optical Storage Technology Association industry trade association References Reflist Optical storage media DEFAULTSORT Optical Storage ... more details
Optical physics is a subfield of atomic, molecular, and optical physics . It is the study of the generation of electromagnetic radiation , the properties of that radiation, and the interaction of that radiation with matter , especially its manipulation and control. It differs from general optics and optical engineering in that it is focused on the discovery and application of new phenomena. There is no strong distinction, however, between optical physics, applied optics, and optical engineering, since the devices of optical engineering and the applications of applied optics are necessary for basic research in optical physics, and that research leads to the development of new devices and applications. Often the same people are involved in both the basic research and the applied technology development. Researchers in optical physics use and develop light sources that span the electromagnetic spectrum from microwave s to X ray s. The field includes the generation and detection of light, linear and nonlinear optics nonlinear optical processes, and spectroscopy . Laser s and laser spectroscopy have transformed optical science. Major study in optical physics is also devoted to quantum optics and Coherence physics coherence , and to femtosecond optics. In optical physics, support is also provided in areas such as the nonlinear response of isolated atoms to intense, ultra short electromagnetic ... field. Other important areas of research include the development of novel optical techniques for nano optical measurements, diffractive optics , low coherence interferometry , optical coherence tomography , and near field microscopy . Research in optical physics places an emphasis on ultrafast optical science and technology. The applications of optical physics create advancements in telecommunication ..., Cambridge University Press, 2009, ISBN 978 0 521 56457 2. Handbook of atomic, molecular, and optical ... Optical Physics Category Atomic, molecular, and optical physics Category Optics bn ... more details
Matt Quinn , better known as Optical , is a drum and bass Music producer producer and DJ from England . He is best known for his work with Ed Rush , fellow head of the Virus Recordings label, and as a pioneer of the techstep and neurofunk sound. His first single for Metalheadz , To Shape the Future Raging Calm 1997 and his collaborative material with Ed Rush, such as the Wormhole album Wormhole , album 1998 were archetypal developments in the style. The duo followed this debut album with The Creeps 2000 and The Original Doctor Shade 2003 , as well as countless singles and remixes. He also notably did most of the engineering and production work for Grooverider s album Mysteries of Funk . In addition, he has produced solo, and released in collaboration with many artists, including Trace artist Trace , Dom & Roland , Fierce band Fierce , and his brother Matrix artist Matrix . External links Rolldabeats artist artist optical name Optical Discogs artist artist Optical name Optical Discogs artist artist Ed Rush 26 Optical name Ed Rush & Optical Persondata Metadata see Wikipedia Persondata . NAME Optical ALTERNATIVE NAMES SHORT DESCRIPTION DATE OF BIRTH PLACE OF BIRTH DATE OF DEATH PLACE OF DEATH DEFAULTSORT Optical Category English record producers Category English DJs Category English drum and bass musicians Category Living people UK electronic musician stub ... more details
multiple issues orphan February 2009 unreferenced October 2008 Sterling Optical is a franchised retail optical chain headquartered in Garden City, New York . There are currently 155 locations in the United States, Canada , and the U.S. Virgin Islands . History Sterling Optical opened in 1912 with a single store in the financial district of New York City . In 1954, a second location opened in Washington, D.C. In 1966, Sterling Optical acquired IPCO, a retail optical chain in the northeastern United States. The chain grew to 20 stores by 1970 and to 65 by 1975. Over the next 5 years, the chain grew to almost 130 stores. In January 1992, Sterling Optical was incorporated in New York as a result of a reorganization and was renamed Sterling Vision Inc., with stores doing business as Sterling Optical. During this period, Sterling Vision acquired the Site for Sore Eyes chain in California as well as VCC, a specialized healthcare maintenance organization licensed by the California Department of Corporations. VCC employs licensed optometrists which operate under the tradename Sterling VisionCare in locations which are usually adjacent to a Sterling Optical location. In 1996, the company opened two lasik centers named Insight Laser Centers, one in New York and the other in San Francisco . These locations have since ceased operations. In 2005, Sterling Optical began using cartoon character Mr. Magoo as their spokesman. Category Companies based in New York City Category Companies established in 1912 ... more details
Unreferenced stub auto yes date December 2009 For a mirror holder Mirror mount Orphan date November 2006 An optical mount is a device used to join a normal camera and another optical instrument, such as a microscope or telescope . The optical mount is generally attached to the camera as a camera lens lens would on one end, and fastened to the other instrument in a similar fashion. Optical mounts are used extensively in science scientific imaging applications in biology and astronomy . DEFAULTSORT Optical Mount Category Photography equipment Category Microscopy Category Astronomical instruments Photography stub ... more details
Unreferenced stub auto yes date December 2009 An optical reader is a device found within most computer Image scanner scanners that captures visual information and translates the image into digital information the computer is capable of understanding and displaying. An example of optical readers are marksense systems for election s where voters mark their choice by filling a rectangle, circle or oval, or by completing an arrow. After the voting a tabulating device reads the votes using dark mark logic , whereby the computer selects the darkest mark within a given set as the correct choice or vote. Marksense is also used extensively in such areas as lottery lotteries and multiple choice tests. See also Digital paper Optical scan voting system References reflist noreferences date March 2010 DEFAULTSORT Optical Reader Optics stub Category Optical devices ... more details
copy edit date April 2012 nr date March 2010 About the optical component the optoelectronic component Slotted optical switch In telecommunication , an optical switch is a switch that enables signals in optical fiber s or integrated optical circuit s IOCs to be selectively switched from one Telecommunication circuit circuit to another. Terminology The word is used on several levels. In commercial terms such as the telecom optical switch market size it refers to any piece of circuit switching equipment ... the world of telecom systems, an optical switch is the unit that actually switches light between ... light i.e., to switch wavelengths or signals within a given fiber . Hence a certain portion of the optical switch market is made up of photonic switches. These will contain within them an optical switch, which will, in a small number of cases, be a photonic switch. Operation An optical switch may operate by mechanical means, such as physically shifting an optical fiber to drive one or more alternative fibers, or by electro optic effect s, magneto optic effect s, or other methods. Slow optical switches, such as those using moving fibers, may be used for alternate routing of an optical switch ... . Fast optical switches, such as those using electro optic or magneto optic effects, may be used to perform logic operation s also included in this category are the semiconductor optical amplifiers , which are optoelectronic devices that can be used as optical switches and be integrated with discrete or integrated microelectronic circuits. Patents A search on optical switch http patft.uspto.gov ... involving arrays of micromirrors that can deflect an optical signal to the appropriate receiver ... enhanced optical switching characteristics Inkjet methods involving the intersection of two waveguides ... it is e.g., Patent 7,027,211 . See also Optical cross connect Optical buffer Optical transistor Optical ... Chip ABC TV Science References FS1037C Category Fiber optic communications Switch, optical optics ... more details
Multiple issues unreferenced December 2009 orphan November 2006 context October 2009 Optical films are several kinds of industrial and chemical thin film optics . They are mainly used for liquid crystal display panels. DEFAULTSORT Optical Film Category Liquid crystal displays Video tech stub ... more details
tape or optical discs. For example, the goal of the LOTS project in 1995 was to achieve a data transfer ... contact with a magnetic head. See also Creo Former manufacturer of Optical tape recorders, now a part of Kodak . TRAAMS Tape based Rapid Access Affordable Mass Storage An optical tape technology developed by a consortium led by Terabank , Inc.. LOTS Laser Optical Tape Storage Another optical ... 2001 EmergTechPanel LOTS 20Conf2001.pdf Technical explanation of Laser Optical Tape Storage technology LOTS . ref References Reflist Optical storage media DEFAULTSORT Optical Tape Category Optical computer storage media de Optisches Band ... more details
TMB Optical of Cleveland, OH is a manufacturer of amateur optical telescope telescopes and accessories, specializing in apochromat ic refracting telescope refractors and astronomical eyepiece s. TMB was named after its founder, optics designer Thomas M. Back . Besides producing optical equipment, TMB has licensed optics designs to other manufacturers, such as Astronomics and Burgess Optical. Thomas M. Back died in September, 2007, but the company continues in operation. External links http www.tmboptical.com Company website http www.cloudynights.com item.php?item id 1549 An interview with Thomas Back Category Telescope manufacturers Category Companies based in Cleveland, Ohio US manufacturing company stub ... more details
Image Optical Trap Ray Optics Explanation.jpg thumb right A Free body diagram force diagram showing how vertical and lateral stabilization occurs in a vertically oriented optical trap. Optical levitation is a method developed by Arthur Ashkin whereby a material is levitation levitated against the downward force of gravity by an upward force stemming from photon momentum transfer. Typically photon radiation pressure of a vertical upwardly directed and focused laser beam of enough intensity counters the downward force of gravity to allow for a stable optical tweezers optical trap capable of holding small particles in suspension. Micrometer sized from several to 50 micrometer in diameter transparent dielectric spheres such as fused silica spheres, oil or water droplets, are used in this type of experiment. The laser radiation can be fixed in wavelength such as that of an argon ion laser or that of a tunable dye laser . Laser Power physics power required is of the order of 1 Watt focused to a spot size of several tens of micrometers. Phenomena related to morphology dependent resonance s in a spherical optical cavity have been studied by several research groups. For a shiny object, such as a metallic micro sphere, stable optical levitation has not been achieved. See also Electrostatic levitation Magnetic levitation Acoustic levitation Aerodynamic levitation Laser propulsion List of laser articles Physics stub Category Levitation ko ... more details
Unreferenced date November 2006 An optical turnstile is a physical security device designed to restrict or control access to a building or secure area . Optical turnstiles are usually a part of an access control system, which also consists of software, card readers, and controllers. Optical turnstiles operate much like regular mechanical turnstile s, except that they rely primarily on electronic infrared beams, and audible visual interfaces to control entry. Rather than physically restraining a person, the optical turnstile uses sounds and lights to alert others to attempted entry by unauthorized individuals. For this reason, the products are not likely to be used in Subway rail subway s and stadium s, so much as they are suited for settings where design and aesthetics are important, such as Lobby room lobbies . They are perfect for high rise buildings with a single path through the lobby and staffed reception. The rate of people passing through the optical turnstile checkpoint is high, lessening the delay that other methods would have. They are also suitable for the handicapped in that they are barrier free. Early optical turnstiles used programmable logic controllers and banks of relays to control the access card and infrared sensor inputs and the indicating lights and audible outputs. These older designs required a large control footprint and were very complicated. The first optical turnstiles were developed for the San Francisco market by Omega Corporate Security of Walnut Creek, California . Early installations included Charles Schwab Corp. Charles Schwab , East Bay Municipal Utility District , and Wells Fargo . See also multicol Access control ID Card multicol break Physical security Security multicol break Stile Turnstile multicol end External links http www.turnstile.com products optical Types of Optical Turnstiles by a US Manufacturer DEFAULTSORT Optical Turnstile Category Security Category Types of gates ... more details
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