wiktionary Projector may refer to Image projector , a device that projects an image on a surface Video projector , a device that projects a video signal from computer, home theater system etc. Movie projector , a device that projects moving pictures from a filmstrip Slide projector , a device that projects a still image with a transparent base Overhead projector , a device that projects a transparent image Opaque projector , a predecessor to the overhead projector Planetarium projector , a device that projects images of sky objects Magic lantern projector , a historic projection device Camera obscura , the historic ancestor to projection devices Enlarger , a device used to produce photographic prints from negatives Ceiling projector , a device used to measure the height of clouds Projection linear algebra , a linear transformation of a vector space Projector album Projector album , an album by Dark Tranquillity A type of mortar weapon A version control system used in the Macintosh Programmer s Workshop As a synonym for Corporate promoter promoter , e.g. in the phrase railway projectors Projector patent is an archaic term in US patent law meaning original inventor to reduce an invention to practice. disambig bs Projektor vor cs Projektor eo Projekciilo fr Projecteur ko id Proyektor pt Projetor sh Projektor zh ... more details
wiktionary film projector Film projection or Film projector may refer to Movie projector for projection of moving images from film Slide projector for projection of still images from film See also Projector disambiguation disambig ... more details
Projector Obscura is a timebased art collective based in Melbourne , Australia . History Projector Obscura was formed in 2007 by a group of students in RMIT University , Melbourne. They describe themselves as Born in 2007, Projector Obscura are a group of artists who perform live visual mixing, organise & promote projector based events as well as instigating temporary street art installations on vacant walls around Melbourne s CBD . ref Group s facebook page. http www.facebook.com pages Projector Obscura 14857385353?ref ts pages Projector Obscura 14857385353?v info&ref ts ref They have been involved in numerous Festivals since their inspection in 2007 including but not restricted to The Gertrude St Projection Festival, The Renaissance Music Festival, The Interventionist Festival, This Is Not Art Festival, The Melbourne International Arts Festival and Melbourne Fringe Festival Digital Fringe . References reflist Category Melbourne culture melbourne stub art org stub ... more details
Image Projecteur de diapositives Prestinox d but des ann es 1960.jpg thumb A 1960 slide projector Image Diaprojektor beleuchtungssystem IMGP1044.jpg thumb Light path A slide projector is an opto mechanical device to view Photography photographic Reversal film slides . Slide projectors were common in the 1950s to the 1970s as a form of entertainment family members and friends would gather to view slide show s. In home photographic slides and slide projectors have largely been replaced by low cost paper prints, digital cameras, DVD media, video display Computer monitor monitors , and video projector s. A projector has four main elements electric incandescent light bulb or other light source usually fan cooled reflector and condensing lens to direct the light to the slide slide holder focusing lens optics lens A flat piece of heat absorbing glass is often placed in the light path between the condensing lens and the slide, to avoid damaging the latter. This glass transmits visible wavelengths but absorbs infrared . Light passes through the transparent materials transparent slide and lens, and the resulting image is enlarged and projected onto a perpendicular flat projection screen screen ... or by bumping into the projector. It is also increasingly difficult in some countries to locate ... have stopped production of slide projectors. Types of projector Carousel slide projector s Straight tray slide projectors Dual slide projector s Overhead projector s Single slide projector s manual form Viewer slide projector s Slide Cube projector s Stereo slide projector s project two slides ... to viewers wearing polarizing glasses Large Format Slide Projector for use on stages, at large ... also Projector disambiguation References cite web title Slide projectors get smarter all the time ... Technology Photography Category Projectors photo stub ar ca Projector de diapositives ... ja pl Rzutnik przezroczy pt Projetor de slides ru simple Slide projector fi Diaprojektori ... more details
Image Ceiling projector extexterior.JPG right thumb Ceiling projector exterior Image Ceiling projector interior.JPG left thumb Interior of a ceiling projector Image Alidade for ceiling projector.JPG right thumb Alidade for use with a ceiling projector The ceiling projector or cloud searchlight is used to measure the height of the base of clouds called the ceiling above the ground. It is used in conjunction with an alidade , usually positioned 1000 ft 304.8 m away and wherever possible set at the same level. The projector is normally set at 90 Degree angle , although 71 31 may be used, in relation to the terrain. The projector consists of a 430 Watt W incandescent bulb set in a weatherproof housing. Inside the housing are two mirror s the first, above the bulb, reflects the light downwards to the second mirror, that then reflects the light upwards to the cloud. Both mirrors are focused to produce a high intensity beam of light that renders a visible spot on the base of the cloud. The alidade is mounted on a post at a height of 5 ft 1.524 m from the ground. It consists of an arm with a pointer and open sight at one end and a rubber eyepiece at the other. The arm is mounted onto a curved scale that is marked both in meters and the coded cloud height feet . The observer looks through the eyepiece and sets the sight onto the spot projected on the cloud and reads the height from the attached scale. When the cloud is thin the beam of light may penetrate into the cloud. The observer should read the scale where the light first enters the cloud and not at the top. However, a remark may be made as to how far into the cloud the light was able to penetrate as this may be useful. In the case of fog or blizzard conditions the observer should read the scale where the beam disappears. clear See also Commons Ceiling projector Ceilometer Trigonometric function Triangle References Department of Transport Canada Meteorological Branch Ceiling Projectors and Associated Equipment Manual 70 ... more details
about the pyrotechnic special effects device by this name the military weapon originally called a flame projector flame thrower File Fire Poofer.jpg right thumb a flame projector In pyrotechnics , a flame projector is a special effects device that projects a column of flame upwards, for a short, determined and controllable, period, usually on the order of a few seconds. ref name Kosanke ref cite book pages 534 title Lighting control technology and applications author Robert S. Simpson publisher Focal Press date 2003 isbn 0240515668 isbn13 9780240515663 ref The simplest form of flame projector is simply a vertical tube mounted on a base, containing powder and a hole for an electric match . ref name Kosanke cite encyclopedia encyclopedia The Illustrated Dictionary of Pyrotechnics author Bonnie J. Kosanke publisher Journal of Pyrotechnics date 1995 isbn 1889526010 isbn13 9781889526010 article Flame Projector pages 50 ref Flame projectors can produce flames of different colours by simply adding a colouring agent. Potassium compounds make purple compounds, for instance. Lithium and strontium are red, sodium is bright yellow, copper and boron compounds are blue or green. ref name Kosanke References references Category Pyrotechnics technology stub ... more details
Infobox album See Wikipedia WikiProject Albums Name Projector Type studio Artist Dark Tranquillity Cover Projector album cover.jpg Released 21 June 1999 in music 1999 br see Release history release history small ref http www.metal archives.com albums Dark Tranquillity Projector 89 ref Recorded September 1998 br Studio Fredman Genre Melodic death metal , Gothic metal , Alternative metal Length 54 23 Label Century Media Records Century Media Producer Fredrik Nordstr m Last album The Mind s I album The Mind s I br 1997 This album Projector br 1998 Next album Skydancer Of Chaos and Eternal Night br 1999 Misc Extra album cover Upper caption Alternative Cover Type studio Cover Projector Japan.jpg Lower caption Japanese Edition Cover Album ratings rev1 Allmusic rev1score Rating 3 5 ref Allmusic class album id r426983 pure url yes Allmusic review ref Automatically generated by DASHBot Projector is the fourth full length studio album by the melodic death metal band Dark Tranquillity . It is the last Dark Tranquillity release with Fredrik Johansson musician Fredrik Johansson . It marked a departure for the band renowned as one of the founders of the Gothenburg Sound . Eschewing much of their trademark dual guitar passages and death growl ing, Dark Tranquillity s Projector album featured some piano and clean guitar parts akin to that of traditional metal. The album was also the first to include vocalist Mikael Stanne on clean vocals Stanne delivered some of the lyrics in an operatic baritone ... efforts, Projector was met with mixed opinions by longtime fans, but it also attracted a fair ... on UnDo Control Johan Carlberg photography References reflist Dark Tranquillity DEFAULTSORT Projector ... Category Albums recorded at Studio Fredman 1990s death metal album stub bg Projector da Projector de Projector fr Projector it Projector pl Projector ru Projector fi Projector sv Projector tr Projector uk Projector ... more details
and transparent images See also Projector disambiguation for a directory of projector types. References ... of the Braun Paxiscope unit DEFAULTSORT Opaque Projector Category Projectors ca Episcopi da Episkop ... more details
Refimprove date December 2009 Superherobox Wikipedia WikiProject Comics image File XMEN Projector.jpg 250px caption Panel from Uncanny X Men 492 comic color background ff8080 character name Projector real name Zachary Williams species Mutant Marvel comics Human Mutant publisher Marvel Comics debut Quicksilver 9 1998 creators alliance color background ffc0c0 alliances Acolytes comics Acolytes aliases powers Force field generation Projector Zachary Williams is a fictional character, a Mutant Marvel comics mutant villain from Marvel Comics . Fictional character biography Projector is one of the newer members of the Acolytes comics Acolytes , and first appeared in Quicksilver comics Quicksilver 9. He was later seen on Genosha . Projector has not been seen for some time after Cassandra Nova s Sentinel comics Sentinels destroyed Genosha, killing 16 million mutants, but he did survive the attack. After M Day Messiah Complex Projector is one of the few that survived the assault on Genosha, and retained his mutant powers during the Decimation comics M Day . He later made his return in the event, X Men Messiah Complex as a member of a group of Acolytes 28comics 29 Ex Acolytes former Acolytes who were hiding out on their own. ref name UXMEN492 Uncanny X Men 492 ref They were tracked down by the X Men looking for information on the whereabout of Exodus and his current group of Acolytes. Projector and his teammates fought back, but they were outmatched, and after taking a vicious beating from Wolverine, Projector cracked and told them what he knew. ref name UXMEN492 What became of him and his teammates afterward is unknown. Powers and abilities Projector could emanate an unknown energy force allowing him to form solid energy constructs and forcefields around himself or others, shaping them into simple forms like ramps, spheres, and pillars. These fields appear to behave as physical constructs and are not indestructible. ref name UXMEN492 References references DEFAULTSORT Project ... more details
missing Image CrtSonyG90.jpg 150px thumb right Sony VPH G90, a CRT projector . Image Projection screen home2.jpg thumb Projected image from a video projector in a home cinema . A video projector is an image projector that receives a video Signalling telecommunication signal and projects the corresponding ... connected to an interactive whiteboard to interactively teach pupils. Overview A video projector, also known as a digital projector, may project onto a traditional reflective projection screen, or it may ... to form a single unified display device. Common display resolution s for a portable projector include ... of a device is determined not only by its resolution but also by its light output. A projector .... A few camcorder s have a Camcorder Camcorder with built in projector built in projector suitable ... are portable. Projection technologies Image kalht 01.jpg 150px thumb right A Zenith 1200 CRT Projector based home cinema home theater , ca. 2006. CRT projector using cathode ray tube s. This typically ... projector using LCD light gates. This is the simplest system, making it one of the most common and affordable .... Digital Light Processing DLP projector using Texas Instruments Digital Light Processing DLP technology ... each primary color simultaneously. Liquid crystal on silicon LCoS projector using Liquid crystal ... by Kloss Video Corporation Kloss Video Talaria projector Talaria oil film projectors Do it yourself ... video projectors. ref cite web title Supersize Your TV for 300 Build Your Own XGA Projector publisher ... purposes. See also 3LCD LCD projector Comparison of display technology Digital cinema Digital divide Digital Light Processing DLP Handheld projector Inflatable movie screen Large screen television technology Live event support Projection screen Projector disambiguation Screen door effect Video ... be x old ca Projector de v deo cs Video projektor de Videoprojektor et Videoprojektor ... ja pl Projektor komputerowy pt Videoprojetor ru simple Video projector fi ... more details
Notability Companies date January 2011 Unreferenced date January 2011 Projector Records is a record label based in Brixton , South London , United Kingdom UK . Projector is home to electronic music electronic experimental music experimentalists such as Vertical Cat , Noakes Pressure , Volunteer band Volunteer and Cabin 33 , collected on their 2004 compilation Know Your Monkey . This has been followed by 7 releases from Volunteer and Dan Lo Fi, and the 2006 12 compilation We are Stupid . The label is mainly notable for much of its early output defining the sound that was to become known as Grime or Dubstep . See also List of record labels External links http projectorrecords.com Official site Category British record labels Category Electronic music record labels Category Experimental music record labels UK record label stub ... more details
For other uses of the term throw Throwing disambiguation In film terminology, throw is the distance of a movie projector from the screen. It is the distance the image is thrown onto the screen, and it has a large effect on screen size. Often in home cinema home theatre individuals lack the correct throw distance in the room but can buy a short throw lens . There are also long throw lenses available. A related term, throw ratio , refers to the ratio of the distance to the screen throw to the screen width. A larger throw ratio corresponds to a more tightly focused optical system. Throw Ratio D W File Projector Screen Geometry Throw Ratio.png Category Projectors ... more details
File Schallwelle 2012 Img04 Opening 01.jpg thumb A Zeiss projector Zeiss Universarium Mark IX starball projector A planetarium projector is a device used to project images of celestial objects onto the dome in a planetarium . The first modern planetarium projectors were designed and built by the Carl Zeiss Jena company in Germany between 1923 and 1925, and have since grown more complex. Smaller projectors include a set of fixed stars, Sun, Moon, and planets, and various nebula e. Larger machines also include comet s and a far greater selection of stars. Additional projectors can be added to show twilight around the outside of the screen complete with city or country scenes as well as the Milky Way . Still others add coordinate lines and constellation s, photographic slides, laser displays, and other images. The IMAX OMNIMAX Film movie system now known as IMAX Dome was originally designed to operate on planetarium screens. 1960s File UniversalProjectionPlanetarium Type23 6.jpg thumb 250px Zeiss Jena Universal Projection Planetarium Type 23 6 1 Constellation Figure Projector North 2 Star Globe North 3 Mechanical shutter of star field projector 4 Milky Way projector North 5 Planetary projectors North 6 Lattice ring for Sun, Moon and Vertical circle projectors 7 Horizon circle projector 8 Planetary projectors South 9 Star Globe South 10 Compass point projector A good example of a typical planetarium projector of the 1960s was the Universal Projection Planetarium type 23 6, made by Volkseigener ... projector was a convert 13 ft m sing on long dumbbell shaped object, with convert 29 in mm sing ... projector technology File INFINIUM L OSAKA.jpg thumb upright 1.3 A Konica Minolta Infinium projection ..., in which a single large projector with a fish eye lens, or a system of digital video or laser video ... in space and time . See also List of planetariums Fulldome Fulldome Video Planetarium Zeiss projector ... Planetarium Projector Museum private collection of retired projectors Category Glass engineering ... more details
refimprove date December 2011 An LCD projector is a type of video projector for displaying video, images or computer data on a screen or other flat surface. It is a modern equivalent of the slide projector or overhead projector . To display images, LCD liquid crystal display liquid crystal display projectors ... of both projection surface and projector quality. Since white is more of a neutral color, white surfaces ... can throw off color tones. Color problems can sometimes be adjusted through the projector settings, but may not be as accurate as they would on a white background. Throw A projector s Throw projector ... ratio is 2 1 and the projector is fourteen feet away from the screen, then the display width will be seven feet. History The LCD projector was invented by American inventor Gene Dolgoff . He began working on it in college in 1968 as a way to produce a video projector that would be brighter than the then available 3 CRT projector s. The idea was to use an element referred to as a light valve to regulate ... s first LCD projector. After building it, he saw many problems that had to be corrected including ... all around the world filing the first LCD projector patent application in 1987 , he started Projectavision, Inc. in 1988, the world s first LCD projector company, which he took public on Nasdaq ... the technology and has branded it as 3LCD . To market 3LCD projector technology, Epson also set up a consortium called the 3LCD Group in 2005 with other projector manufacturer licensees of 3LCD technology that use it in their projector models. Early LCD systems were used with existing overhead projectors ... on top of the projector in place of the transparencies. This provided a stop gap solution in the era ... date December 2011 an equal of an LCD projector is the LG 100 inch LCD TV, still in prototype stages this television is a huge advancement towards projector sized televisions. A common rule of thumb ... projector is frequently used by hobbyists who build their own DIY do it yourself do it yourself ... more details
S1000pj compact camera projecting an image using its built in projector File 3M pocket projector at B&H Photo jeh.jpg thumb 3M pocket projector displayed in shop A Handheld projector also known as a pocket projector , mobile projector , pico projector or mini beamer is an emerging technology that applies the use of an image projector in a handheld device . It is a response to the emergence of compact ... of a handheld projector is the ability to project a clear image, regardless of the physical characteristics ... of hand held pico type video projector s. The concept was introduced by Explay in 2003 and shown ... Projector Engine url http www.azonano.com news.asp?NewsID 1749 date 2005 01 04 ref The first public ... than white LED LCoS units. Laser video projector Laser scanning projectors such as Microvision s ShowX ... a major challenge. Applications Handheld projector can be used for different applications than small ... 1641 1 mobilehci2008 hang.pdf Projector Phone A Study of Using Mobile Phones with Integrated Projector for Interaction with Maps Proceedings of the Conference on Human Computer Interaction with Mobile ... projector. Mobile Recent mobile phones have the ability to store thousands of photos and can be used ... small displays. Projector phones allow photographs to be shared with a larger audience. ref ... and Sharing Framework using a Projector Phone , Proceedings of the Workshop on Mobile Interaction ... with projector phones compared to using conventional mobile phones. ref A. Greaves and E. Rukzio ... projector I8520 Galaxy Beam , the LG eXpo Projector Phone, and the NTT DoCoMo F 04B Projector Phone. Gaming Handheld projectors, in particular projector phones, could offer new possibilities for mobile ... Reality Game for Camera Projector Phones , Proceedings of the Workshop on Mobile Interaction with the Real ... recognition using shadow occluding of the projector, called ShadowPuppets . ref Cowan, L., Li, K ... Projector Phones Using Hand Shadows , In Proceedings of ACM Conference on Human Factors in Computing ... more details
infobox weapon name Holman Projector image Image Holman Projector in action.jpg 300px caption A Holman Projector prepared for early trials at Porthtowan . A crude anti aircraft Sight device sight is fitted to the mortar barrel. origin flagcountry United Kingdom type Grenade Projector Type selection is ranged YES Service history service used by wars Production history designer design date manufacturer unit cost production date number variants General specifications spec label weight length part length Ranged weapon specifications cartridge cartridge weight caliber barrels action rate velocity range max range feed sights The Holman Projector was an anti aircraft warfare anti aircraft weapon used by the Royal Navy during World War II , primarily between early 1940 and late 1941. The weapon was proposed .... An official trial of the Mk I Projector took place in February, 1940 with resounding success. An order ... out. While direct hits were rare, the bombs fired by the projector displayed an unexpected property ... pilots that the target vessel was armed with something far more deadly than the Holman Projector. Mk II The Mk II Projector was developed after a request from the Royal Navy for a version that could ... at lunch. The smooth bore of the Projector allowed even these irregular projectiles to be fired successfully ... about Luftwaffe aircraft turning away from an attack after salvoes from the ship s Holman Projector were launched. Within the Admiralty , the perception was that the Projector was a useful Improvised ... III Holman Projector began. This version was semi automatic, and capable of firing multiple projectiles ... recoil of the weapon had proven useful. Plans were drawn up for a Mk IV version of the Projector ... that made the Projector obsolete. A number of the earlier model Projectors still played a part ... See also Northover projector , another WWII grenade throwing device AA Mine Discharger , a Japanese ... Navy, 1939 1944 , HMSO , 1944. External links Commons category Holman Projector WWIIBritishCommNavalWeapons ... more details
Refimprove date February 2008 Image OHP sch.JPG thumb right 300px Overhead projector in operation during a classroom lesson An overhead projector is a variant of slide projector that is used to display images to an audience. Mechanism An overhead projector typically consists of a large box containing ... the light forward instead of up. transparency overhead projector Transparencies are placed ... close the projector is to the screen. Focal length adjustment Better quality overhead projectors offer an adjustment wheel or screw on the body of the projector, to move the lamp towards or away from ... of an overhead projector is typically very simple compared to a modern LCD or DLP video projector ... was cast to the sides inside the projector body that was wasted and required a very large lamp ... to be installed in the projector in movable sockets. If one lamp fails during a presentation, the presenter ... it. History The first overhead projector was used for police identification work. It used a cellophane ... for several optical refinements for the overhead projector and its projection lens. In 1957 ... date March 2010 The overhead projector facilitates an easy low cost interactive environment for educators ... features of the projector allow the educator to write in a comfortable small script in a natural ... system. A liquid crystal panel mounted in a plastic frame was placed on top of the overhead projector ... projector to project the contents of the LCD screen to the wall at a much lower cost than with standard LCD projectors. Due to the mirroring of the image in the head of the overhead projector, the image ... and clarity of an overhead generally cannot match that of a video projector primarily due to the plastic ... for the user than a standard overhead projector. While a computer projection system eliminates ..., the overhead projector allows a more direct interaction through live writing on the transparency. See also Opaque projector , a related type of the projectorProjector disambiguation Slide ... more details
Infobox Weapon name Northover Projector image Image H 11843 Members of Home Guard using a Northover Projector July 1941.jpg 300px caption Members of the Home Guard using a Northover Projector, 1 July 1941 ... carriage elevation traverse The Projector, 2.5 inch &mdash more commonly known as the Northover Projector &mdash was an ad hoc anti tank weapon used by the British Army and British Home Guard Home ... Projector was designed by a Home Guard officer named Robert Harry Northover to act as a makeshift ... One such weapon was the Northover Projector, the invention of Major Robert Harry Northover. ref Cite ... a demonstration of the Northover Projector. The Prime Minister approved of the weapon and gave it his ... for every Home Guard platoon. ref name Mackenzie94 Design File Northover projector practicefort nelson.jpg thumb left Practice ammunition for the Northover Projector File Northover Projector Diagram 3.png thumb right Northover Projector diagram. sfn Military Training Manual No 42 br br Key br br ... br 13 Legs br 14 Primer br The Northover Projector&mdash which was officially labelled the Projector ... were fired from the Projector with a small quantity of black powder ref name Bishop212 detonated ... Longmate79 as well as normal hand and rifle grenades. ref name Bishop212 The Projector had a number ... exhibited a number of faults when used in the Projector they could often explode inside the weapon ..., the Projector gave off a large cloud of smoke which could take up to a minute to clear and revealed ... of the weapon, the Northover Projector Mk 2 was developed in 1941, but few were produced. ref name Bishop212 Operational history The Northover Projector was issued to both Home Guard and regular ..., p. 121 ref Initial reactions to the Northover Projector were varied, with a number of Home Guard ... for the Home Guard, the Northover Projector was only taken out of service when it could be replaced ... title The Northover Projector series Tank Hunting and Destruction, Military Training Manual No 42 ... more details
Image BeamProjector.JPG thumb right A beam projector used with fog in a performance of Les Mis rables musical Les Mis rables School Edition A beam projector is a lenseless stage lighting instrument with very little beam spread. ref cite book last Parker first W. Oren title Scene Design and Stage Lighting id ISBN 0 03 028777 4 publisher Holt, Rinehart and Winston pages 457 458 year 1990 ref It uses two reflectors. The primary reflector is a parabolic reflector and the secondary reflector is a spherical reflector . The parabolic reflector organizes the light into nearly parallel beams, and the spherical reflector is placed in front of the lamp to reflect light from the lamp back to the parabolic reflector, which reduces spill. The result is an intense shaft of light that cannot be easily controlled or modified. Beam projectors are often used to create a godspot effect. The beam projector no longer is used to the extent that it once was, as newer fixtures and parabolic aluminized reflector light PAR lamps have created easier ways to produce the effect. ref cite book last Gillette first J. Michael title Designing With Light An Introduction to Stage Lighting, Fourth Edition id ISBN 0 7674 2733 5 publisher McGraw Hill pages 70 year 2003 ref A similar effect can be produced using ETC Source Four PAR fixtures without a lens. A snoot top hat can be added to control spill. References reflist Stagecraft Nav DEFAULTSORT Beam Projector Category Stage lighting instruments Stagecraft stub ... more details
Image kalht 01.jpg 150px thumb right A Zenith 1200 CRT Projector based home theater. Circa 2006. A CRT projector is a video projector that uses a small, high brightness cathode ray tube CRT or picture tube as the image generating element. The image is then focused and enlarged onto a screen using a lens kept in front of the CRT face. Most modern CRT projectors are color and have three separate CRTs instead of a single, color CRT , and their own lenses to achieve color images. The red , green and blue portions of the incoming video signal are processed and sent to the respective CRTs whose images are focused by their lenses to achieve the overall picture on the screen. Various designs have made it to production, including the direct CRT lens design, and the Schmidt Cassegrain telescope Schmidt CRT, which employed a phosphor screen that illuminates a perforated spherical mirror, all within an evacuated tube. The image in the Sinclair Microvision flat CRT is viewed from the same side of the phosphor struck by the electron beam. The other side of the screen can be connected directly to a heat sink, allowing the projector to run at much brighter power levels than the more common CRT arrangement. ref Innovation in electronics by Alan Burkitt Electronics Servicing & Technology magazine 1982 July ref Advantages and disadvantages Advantages Long service life CRT tubes maintain good brightness to 10,000 hours. ref www.eisemann theater.com ref High end CRT projectors can precisely display images up to 1920 x 1200 ref Barco Cine 9, Sony G90 ref ref The Barco 912 claims an addressable resolution ... weighs 83 kg and measures 0.36 x 0.7 x 0.95 m whereas the LCD based projector weighs 3.6 kg and measures ... aspect ratio. See also LCD projector Digital Light Processing DLP Barco List of CRT video ... External links http www.eisemann theater.com index.php?option displaypage&Itemid 73&op page CRT Projector and Mod Specialist. DEFAULTSORT Crt Projector Category Projectors de R hrenprojektor ko ru ... more details
Projector is a 19th century term in United States patent law meaning the original true inventor. True inventor at the time meant the first inventor to reduce an invention to practice . ref http books.google.com books?hl en&lr &id mbkDAAAAQAAJ&oi fnd&pg PR9&dq projector fraud patent&ots bzcbYA96Hg&sig hXgAhU3hJlXC9pk72Bj0EB4Je9Y v onepage&q projector&f false Willard Phillips, The Law of Patents for Inventions including the remedies and legal proceedings in relation to Patent Rights , pp65 et seq. American Stationers Company, Boston, 1837 ref The term was also used in a derogatory fashion to describe someone who overzealously promotes an invention. ref Frank D. Prager, Proposals for the Patent Act of 1790 , Journal of the Patent and Trademark Office Society , March 1954, vol XXXVI, No. 3, pp 157 et Seq. ref References reflist 2 See also Corporate promoter Inventor patent Patent medicine Patent troll US law stub Category United States patent law ... more details
An image projector is an optical device that projects an image or moving images onto a surface, commonly a projection screen . Most projectors creates an image by shining a light through a small transparent image, but some newer types of projectors can project the image directly, by using lasers. A virtual retinal display , or retinal projector, is a projector that projects an image directly on the retina instead of using an external projection screen. The most common type of projector used today is called a video projector . Video projectors are digital replacements for earlier types of projectors such as slide projector s and overhead projector s. These earlier types of projectors were mostly replaced with digital video projectors throughout the 1990s and early 2000s, but old analog projectors are still used some places. The newest types of projectors are handheld projector s that use laser s or LED s to project images. Movie theater s use a type of projector called a movie projector . Another type of projector is the enlarger , a device used to produce photographic prints from negatives. History of projectors Early history of projectors and cameras Projectors share a common history ... image projector, a device called a magic lantern . In the 17th century, a the first magic lantern ... machine were not uncommon. In fact, a common setup of the machine was to keep parts of the projector ..., a new type of low cost projectors called opaque projector s were produced and marketed as toys for children. The opaque projector is a predecessor to the overhead projector . The light source in early ... and businesses. The first overhead projector was used for police identification work. It used a cellophane ... type of projector called slide projector s were common in the 1950s to the 1970s as a form of entertainment ... http www.precinemahistory.net DEFAULTSORT Image Projector Category Projectors da Billedprojektor de Projektor he io Projektoro nl Projector no Projeksjonsapparat pl Projektor fi Projektori sv ... more details
Unreferenced date June 2008 A laser projector is a collection of laser s, mirror s, a galvanometer scanners and other optical components housed in an enclosure. A laser projector can contain one laser light source for single color projection or possibly three sources for RGB color model RGB red, green, and blue full color projection. Typical components Laser Diodes Direct Injection Red 635 wavelength nm , 642 nm, 650 nm, 660 nm Blue 445 nm Violet 405 nm Solid State DPSS Diode Pumped, Frequency Doubled Red 671 nm Green 532 nm Blue 473 nm, 457 nm Gas lasers Red HeNe Helium Neon 632.8 nm, Krypton 647.1 nm Green Argon 514.5 nm Blue Argon 488 nm or 457.9 nm Multi colour whitelight Mixed gas Argon Krypton 647.1 nm, 514.5 nm, 488 nm, 476.5 nm, 457.9 nm Galvanometer scanners Galvanometers, sometimes .... Controller DAC In the case of using a computer to control a laser projector, a Digital to analog ... that control the scanners in the laser projector. Typically, 2 channels are used for x y position control and 3 channels are used for controlling the RGB values of an RGB projector. In the case of a single color projector, the intensity channel is used instead of the RGB channels. Most commercially ... and pinout for the 25 pin D SUB input connector on the projector. DMX Many laser projectors and galvanometer ... patterns of the projector. A few of these features are Size, pattern, colour and rotation. However ... of controlling the patterns included in your laser projector. A Digital to Analog Converter DAC is required .... A typical analog modulated RGB projector has 256 brightness levels for each laser. This gives 256 x .... Scan angles can be easily calculated using standard trigonometry . See also Laser video projector External links http www.bis0uhr.de projekte laser english.html Three colors homemade laser projector with ATMega64 controller http elm chan.org works vlp report e.html Home Built Laser Projector Category ... more details
The Cyrillic Projector is a sculpture created by United States American artist Jim Sanborn in the early 1990s, and was purchased by the University of North Carolina at Charlotte in 1997. It is currently installed between the campus Friday and Fretwell Buildings. An encrypted family The encrypted sculpture Cyrillic Projector is part of an encrypted family of three intricate puzzle sculptures by Sanborn, the other two named Kryptos and Antipodes sculpture Antipodes . The famous Kryptos sculpture located at Central Intelligence Agency CIA headquarters in Langley, Virginia Langley , Virginia has text which is duplicated on Antipodes. Antipodes has two sides &mdash one with the Latin alphabet and one with Cyrillic script Cyrillic . The Latin side is similar to Kryptos . The Cyrillic side is similar to the Cyrillic Projector . Solution The Russian text of the Cyrillic Projector was finally decrypted and translated in English in 2003 after Elonka Dunin led the charge , ref http www.elonka.com mirrors STL sights.html Woman sets sights on code on CIA sculpture ref with the ciphertext independently decrypted by Frank Corr and Mike Bales, and plaintext translation from Russian provided by Dunin. ref http www.sciencemag.org content vol302 issue5643 r samples.dtl Cyrillic Riddle Solved Science journal Science , vol 302, 10 Oct. 2003, page 224 ref The sculpture includes two messages. The first is a Russian language Russian text that explains the use of psychological control to develop and maintain potential sources of information. The second is a partial quote about the Soviet dissident , Nobel Peace Prize awarded scientist Andrei Sakharov Sakharov . The text is from a Classified information classified KGB memo, detailing concerns that his report at the 1982 Pugwash conference was going to be used by the U.S. for anti Soviet propaganda purposes. Notes references References http www.elonka.com kryptos cyrillic.html Transcript of Cyrillic Projector text http www.elonka.com kryptos Kryptos ... more details
Other uses Zeiss disambiguation File ZeissMark1.jpg thumb right The Mark I projector installed in the Deutsches Museum in 1923 was the world s first planetarium projector. File ZeissPlanetariumProjector MontrealPlanetarium.jpg thumb right Marks II through VI utilized two small spheres of lenses separated along a central axis. File Universarium in Planetarium Hamburg.jpg thumb right Beginning with Mark ... Observatory in Los Angeles. A Zeiss projector is one of a line of planetarium projector .... They are generally large, complicated, and imposing machines. The first Zeiss Mark I projector the first planetarium projector in the world was installed in the Deutsches Museum in Munich in August ... and the two spheres were merged into a single, egg shaped projection unit. The name Zeiss projector is frequently used as a generic term for a star projector, regardless of the manufacturer. Citation needed date July 2011 Being extremely complex, a large Zeiss projector can cost millions of United ... and was the world s first modern planetarium projector. ref name chartrand The Mark II was developed ... . ref name Zeiss cite paper author Carl Zeiss AG title Planetarium projector models since 1942 url ... Germany from 1957 1989. Meanwhile, the East German facility in Jena developed the ZKP projector line ... egg shaped projector, and moving objects such as planets have their own independent projectors or are projected ... September 23, 2011 ref Partial list of planetariums that have featured a Zeiss projector Between .... class wikitable style margin 1em auto 1em auto 1em auto 1em auto Planetarium Zeiss Projector Model ... III 1930 1969 Projector was converted from Mark II to Mark III from 1959 1961 rowspan 2 ref name walsh ... Present The oldest projector which is operating in Japan. rowspan 2 ja Nagoya City Science Museum ... RMSC Strasenburgh Planetarium The Star Projector url http www.rmsc.org StrasenburghPlanetarium ... ?Open Zeiss Planetariums Category Planetaria Category Carl Zeiss Jena nl Zeiss projector ... more details
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