Other uses Image Hologrammit.jpg thumb 253px Hologram artwork in MIT Museum Holography from the Greek ... can be seen The basics below . The technique of holography can also be used to store, retrieve ... Holography was invented in 1947 by the Magyars Hungarian British people British ref Arthur T. Hubbard ... invented is still used in electron microscopy , where it is known as electron holography , but holography .... Specular holography ref Specular holography http www.zintaglio.com how.html ref is a related ... Gabor style holography works by diffractively reconstructing wavefronts. One of the most promising recent advances in the short history of holography has been the mass production of low cost solid ..., which are sometimes also useful for holography. These cheap, compact, solid state lasers can ... holograms and are already helping to make holography much more accessible to low budget researchers, artists and dedicated hobbyists. How holography works A detailed theoretical account of how holography works is provided by Hariharan. ref name Hariharan Optical Holography, P. Hariharan, Cambridge ... recording process Holography is a technique which enables a light field to be recorded, and reconstructed ... where the sound field is encoded in such a way that it can later be reproduced. Though holography ... on a CD. Image Holography reconstruct.svg thumb 300px Holographic reconstruction process When the original ... is focused on the original scene, not on the hologram itself. Holography explained in terms .... Thin holograms The discussion Holography explained in terms of interference and diffraction above of how holography works, relates to a thin amplitude transmission hologram. The transmittance of the recorded ... be recorded holographically. A good holography laser will typically have a coherence length .... It was very common in the early days of holography to use a chess board as the object and then take ... not include the materials used in the Holography Mass replication of holograms mass replication ... more details
cleanup article date March 2008 Acoustic holography is a method that is used to estimate the sound field near a source by measuring Acoustics acoustic parameters away from the source via an array of pressure and or particle velocity transducers . Measuring techniques included within acoustic holography are becoming increasingly popular in various fields, most notably those of transportation, vehicle and aircraft design, and NVH . The general idea of acoustic holography has led to different versions such as near field acoustic holography NAH and statistically optimal near field acoustic holography SONAH . For audio rendition, the wave field synthesis is the most related procedure. References Reflist cite journal author J. D. Maynard, E. G. Williams, and Y. Lee title Nearfield acoustic holography I. Theory of generalized holography and the development of NAH journal The Journal of the Acoustical Society of America month October year 1985 volume 78 issue 4 pages 1395 &ndash 1413 doi 10.1121 1.392911 cite conference author J. Hald title Patch near field acoustical holography using a new statistically optimal method booktitle Inter noise 2003, Jeju International Convention Center, Seogwipo, Korea, 2003 08 25&ndash 2003 08 28 External links http www.acoustic holography.com Acoustic holography http www.lmsintl.com acoustic holography An introduction to Acoustic Holography http www.lmsintl.com sound source localization An introduction to different techniques for Sound Source Localization DEFAULTSORT Acoustic Holography Category Acoustics Category Sound measurements physics stub ... more details
Infobox organization name Holography Ltd. image image border size caption map msize mcaption abbreviation ... Holography Ltd. SE Holography is a company that specializes in production of holograms and holographic security elements ref name ihma . Holography, a member company of the EDAPS Consortium ... of Sciences of Ukraine. Holography Ltd. is a member of the International Hologram Manufacturers Association ... at the International Chamber of Commerce of Ukraine. For 10 years the specialists of SE Holography ... participates in events such as international conferences and exhibitions on security printing and holography Holopack Holoprint, INTERGRAF, Holoexpo, etc. . The Holography s in house developments are manufacturing ..., optical security elements for Ukrainian excise stamps are currently being produced. Holography Ltd ... are exhibited at exhibitions, conferences, symposiums. History SE Holography was established on February ... opening ceremony of SE Holography held on December 6, 2000. In 2001 SE Holography received a license ..., export of holography based security elements designed to meet government needs or custom made ... the security of identity documents for officers of MIA of Ukraine . In March 2004 SE Holography ... overlay produced by SE Holography. Testing carried out throughout the year of 2006 by SE Holography, together with Ukrainian scientists, yielded positive results that were used for making a brand new base for holography security elements with covert tags to upgrade the security of excise stamps on alcohol and tobacco. In October 2007 SE Holography was announced as the printing industry ... Business Rating of Ukraine. Since April 2008 SE Holography, as a member enterprise of EDAPS, has supplied ... of e passports for INTERPOL staff. These passports are protected with holograms created by SE Holography ..., in particular, those of SE Holography as the most efficient ones ref http www.bagnet.org news rating ... news 408331.html UNIAN ref rooted in innovation in holography have been manufactured and supplied by SE ... more details
Wiktionary holography hologram Holography , holographic and hologram can refer to a number of things Holography , a technique for recording and reconstruction of wavefronts A holograph , a document written entirely in the handwriting of the person who signed it. The holographic principle , a conjecture of quantum gravity. In many collectible card game s, holographic or foil editions are rarer versions of pre existing cards, usually those that are the most sought after. In the fictional Star Trek universe, holograms are artificially created people, places and objects see holodeck . In the fictional Star Wars universe, holograms can be recorded, or broadcast to receivers live. Disambiguation ... more details
Electron holography is holography with electron waves. Dennis Gabor invented holography in 1948 ref D. Gabor, A new microscopic principle, Nature 4098, 777 1948 . ref when he tried to improve resolution in electron microscope. The first attempts to perform holography with electron waves were made by Haine and Muley in 1952 ref M. E. Haine, T. Mulvey, The formation of the diffraction image with electrons in the Gabor diffraction microscope, J. Opt. Soc. Am. 42, 763 1952 . ref they demonstrated recorded .... Cowley has described 20 configurations for electron holography ref J. M. Cowley, Twenty forms of electron holography, Ultramicroscopy 41, 335 348 1992 . ref . Usually, high spatial and temporal coherence ... electron holography in off axis scheme Electron holography with high energy electrons 80 200keV ... in TEM.jpg thumb An illustration to off axis electron holography in transmission electron microscope ... ref M. Lehmann, H. Lichte, Tutorial on off axis electron holography, Microsc. Microanal ... of the object function are reconstructed. Electron holography in in line scheme Original holographic ... optical axis. This scheme is also called point projection holography . An object is placed into divergent ... by the size of the electron source. Holography with low energy electrons 50 1000eV can be realized in in line scheme ref H. W. Fink, W. Stocker and H. Schmid, Holography with low energy electrons ... holography scheme. Electromagnetic fields It is important to shield the interferometric system from ... and sample must be properly grounded and shielded from outside noise. Applications Electron holography ref H. Lichte, Electron holography approaching atomic resolution, Ultramicroscopy 20, 293 1986 . ref ref A. Tonomura, Applications of electron holography, Rev. Mod. Phys. 59, 639 1987 . ref is commonly ... et al., Micros. Res. and Tech. 64, 390 2004 . ref . The principle of electron holography can also ... 1993 . ref . References reflist Category Holography electronics stub vi To n nh i n t ... more details
Digital holography is the technology of acquiring and processing Hologram Holographic recording process ... to an optical reconstruction which reproduces an aspect of the object. Digital holography typically ... physics optics book 978 3 540 21934 7 author U. Schnars, W. J ptner title Digital Holography ... holography. I do not understand, why only two... Phase shifting holograms The phase shifting digital holography process entails capturing multiple interferogram s that each indicate the optical ... wave characteristics amplitude, phase, polarization made digital holography a very powerful ... Wavelength multiplexing of holograms is also possible in digital holography as in classical holography ... Polarization microscopy by use of digital holography application to optical fiber birefringence ... ref Super resolution in Digital Holography Superresolution is possible by means of a dynamic phase ... in digital holography by a two dimensional dynamic phase grating M. Paturzo, F. Merola, S. Grilli ... OE.16.017107 ref Optical Sectioning in Digital Holography Optical sectioning, also known as sectional ... optical scanning holography journal Applied Optics volume 48 issue 34 pages H113 H119 year 2009 doi ... images in holography using inverse imaging journal Optics Express volume 16 issue 22 pages 17215 17226 year 2008 doi 10.1364 OE.16.017215 ref Extending Depth of Focus by Digital Holography in Microscopy By using the 3D imaging capability of Digital Holography in Amplitude an Phase it is possible ... holography P. Ferraro, S. Grilli, D. Alfieri, S. De Nicola, A. Finizio, G. Pierattini, B. Javidi ... title Super resolution in digital holography by a two dimensional dynamic phase grating author ... microscopy . See also Computer Generated Holography Computer generated holography Digital holographic ... reconstruction by digital holography Optics Express 9 , 294 302. External links http www.lynceetec.com ... Phase Holographic Imaging Digital holographic microscopy Category Holography de Digitale ... more details
Image holofrog.png thumb right alt specular hologram Three views of a specular hologram. Specular holography is a technique for making three dimensional imagery by controlling the motion of specularities on a two dimensional surface. The image is made of many specularities and has the appearance of a 3D surface stippling made of dots of light. Unlike conventional wavefront holograms , specular holograms do not depend on wave optics, photographic media, or lasers. The principle of operation is purely one of geometric optics A point light source produces a glint on a curved specular shiny surface this glint appears to travel on the surface as the eye or light source moves. If that motion is projectively consistent with binocular disparity , the viewer will perceive via stereopsis the illusion that the glint occurs at a different depth than the surface that produces it. A specular hologram contains many such curved surfaces, all embedded in a host surface. Each produces a glint and the brain integrates the many 3D cues to perceive a 3D shape. Overview and history Specular holography dates back to Hans Weil s attempts in the 1930s and thus has a longer history than conventional wavefront holography . It is used most often in art and optics demonstrations. Historically, it was not very ... holography appears to be a 1934 United Kingdom patent by Hans Weil. ref Hans Weil biography http ... as scratch holography. Beatty established a connection between scratch holography and conventional wavefront holography by pointing out that a circular arc approximates a scaled up Benton rainbow ..., Matt Brand demonstrated a distortion free form of specular holography. Instead of scratches ... ref ref Specular holography web site http www.zintaglio.com ref . References See http en.wikipedia.org ... here automatically Reflist External links http amasci.com amateur holo1.html Scratch holography http www.zintaglio.com Specular holography art page Categories Category Holography Category 3D imaging ... more details
Algebraic holography , also sometimes called Rehren duality , is an attempt to understand the holographic principle of quantum gravity within the framework of algebraic quantum field theory , due to Karl Henning Rehren . It is sometimes described as an alternative formulation of the AdS CFT correspondence of string theory , but some string theorists reject this statement http golem.ph.utexas.edu distler blog archives 000987.html . The theories discussed in algebraic holography do not satisfy the usual holographic principle because their entropy follows a higher dimensional power law. Fact date June 2008 Rehren s duality The conformal boundary of an anti de Sitter space or its universal covering space is the conformal Minkowski space or its universal covering space with one fewer dimension. Let s work with the universal covering spaces. In algebraic quantum field theory AQFT , a QFT in the conformal space is given by a conformally covariant net of C algebras over the conformal space and the QFT in AdS is given a covariant net of C algebras over AdS. Any two distinct null geodesic hypersurfaces of codimension 1 which intersect at more than just a point in AdS divides AdS into four distinct regions, two of which are spacelike. Any of the two spacelike regions is called a wedge. It s a geometrical fact that the conformal boundary of a wedge is a double cone in the conformal boundary and that any double cone in the conformal boundary is associated with a unique wedge. In other words, we have a one to one correspondence between double cones in CFT and wedges in AdS. It s easy to check that any CFT defined in terms of algebras over the double cones which satisfy the Haag Kastler ... versa. This correspondence between AQFTs on both sides is called algebraic holography . Unlike ... Karl Henning Rehren , Algebraic Holography For a classical counterpart to Rehren duality see arXiv arcive hep th id 0708.1283 B.S. Kay and P.Larkin , Pre Holography Category Quantum field theory ... more details
degrade the overall quality of the output. Sonic holography attempts to remove these distortions using a proprietary filter designed by Bob Carver . Dissenting Opinion Sonic Holography is Bob ... not be modified. Some listeners Who date February 2010 feel that Sonic Holography introduces ... article misrepresents what Bob Carver s invention of Sonic Holography is and does. I have taken the following information about Sonic Holography from the user manual of the device where Sonic Holography was first introduced Carver Model C4000 High Fidelity Control Console 1981 by Carver Corporation. In that this preamplifier was the first to incorporate Sonic Holography, it contains an extensive ... Sonic Holography is a method of processing stereo signals so as to correct a basic imaging flaw which ... environment. This is the goal of the Carver Sonic Hologram Generator. SONIC HOLOGRAPHY ... side ear. Conceptually, the object of sonic holography is simply to cancel out that delayed, attenuated ... Sonic Holography Generator circuit is rather more complex than this, but that is the basic operating principle. Why is this process called sonic holography? An optical hologram is a photograph made with a laser ... messages 14476.html Sonic Holography http www.soundclick.com aceholiday Ace Holiday Artist that re creates 1960 s easy listening genre with newly composed songs. Selected tracks produced with Sonic Holography ... . Category High end audio Sonic Holography Category Holography ... more details
Wiktionary Digital holography Digital holography can refer to Methods of analysing holograms digitally Methods of making and pr re constructing holograms digitally usually referred to as Computer Generated Holography Disambiguation ... more details
Unreferenced stub auto yes date December 2009 Orphan date December 2009 Phase coherent holography is a type of holography , in which diffraction undiffracted beams are deflected phase coherence physics coherent . DEFAULTSORT Phase Coherent Holography Category Holography Optics stub ... more details
Orphan date February 2009 merge Holographic data storage discuss Talk Electronic quantum holography Merger proposal date February 2009 Electronic quantum holography is a new technology devised by scientists to encode and read out data at unprecedented density. ref cite news title Sub atomic scale Writing Using a Quantum Hologram Sets New Size Record url http home.slac.stanford.edu pressreleases 2009 20090128.htm publisher SLAC National Accelerator Laboratory date January 28, 2009 accessdate 2009 02 01 ref References reflist Category Holographic memory ... more details
X ray Fluorescence Holography XFH is a relatively new technique that benefits greatly from the coherent high power X ray s available from synchrotron sources, such as the Japan ese SPring 8 facility. X ray fluorescence Fluorescent X ray s are scattered by atoms in a sample and provide the object wave, which is referenced to non scattered X rays. A holographic pattern is recorded by scanning a detector around the sample, which allows researchers to investigate the local 3D structure around a specific element in a sample. ref http www.springerlink.com content nhw43x76k4929x73 ref ref http scripts.iucr.org cgi bin paper?au0313 ref It is useful for investigating the effects of irradiation on high temperature superconductor s. One of the critizims for this method is that it suffers from twin images. D. Gabor. Barton proposed that reconstructed phased images of holograms will suppress twin images effects. ref http www.sciencedirect.com science? ob ArticleURL& udi B6TVF 49XPCJ3 4& user 10& coverDate 01 2F02 2F2004& rdoc 1& fmt high& orig search& origin search& sort d& docanchor &view c& searchStrId 1629656773& rerunOrigin google& acct C000050221& version 1& urlVersion 0& userid 10&md5 59cc738c9e368c17d0f9007a6cbcecb0&searchtype a ref References reflist DEFAULTSORT X Ray Fluorescence Holography Category Spectroscopy Category Holography Physical chemistry stub ... more details
Image Planar waveguide.gif thumb right 200px Planar waveguide Digital Planar Holography DPH is a new technology, developed recently When date February 2011 for fabricating miniature components for integrated optics . The essence of the DPH technology is embedding Digital holography digital holograms , calculated in a computer, inside a Waveguide optics Dielectric slab waveguide planar waveguide . This allows for light propagation in the hologram plane rather than in the perpendicular direction and results in a long interaction path. Benefits of a long interaction path are well known for Volume hologram volume thick holograms . On the other hand planar configuration provides easy access to the surface, where the hologram should be embedded. As it is well known, light can be confined in waveguides by a refractive index gradient. Light propagates in a core layer, surrounded with a cladding layer s , which should be selected the core refractive index N sub core sub is greater than that of cladding N sub clad sub N sub core sub N sub clad sub . Cylindrical waveguides optical fiber optical fibers allow for one dimensional light propagation along the axis. Waveguide optics Dielectric slab waveguide Planar waveguides , fabricated by sequential depositing flat layers of transparent materials with a proper refractive index gradient on a standard wafer, confine light in one direction axis z and permit free propagation in two others axes x and y . Light wave, propagating through the core, extends to some distinct into the both cladding layers. If the refractive index is modulated in the wave path, light of each given wavelength can be directed to a desirable point. br The DPH technology ... et al., Digital Planar Holography and multiplexer demultiplexer with discrete dispersion, Proc ... WDM devices, Proc. SPIE, Vol. 4989, pp. 131 136 2003 DEFAULTSORT Digital Planar Holography Category Holography ... more details
Computer Generated Holography CGH is the method of digitally generating holography holographic Interference wave propagation interference patterns . A holographic image can be generated e.g. by digitally computing a holographic interference pattern and printing it onto a mask or film for subsequent illumination by suitable coherent light source. br Alternatively, the holographic image can be brought to life by a holographic 3D display a display which operates on the basis of interference of coherent light , bypassing the need of having to fabricate a hardcopy of the holographic interference pattern each time. Consequently, in recent times the term computer generated holography is increasingly being used to denote the whole process chain of synthetically preparing holographic light wavefronts suitable for observation. ref Cite author Ch. Slinger, C. Cameron, M. Stanley title Computer Generated Holography as a Generic Display Technology journal Computer publisher IEEE date Aug. 2005 ref Computer generated holograms have the advantage that the objects which one wants to show do not have to possess any physical reality at all completely synthetic hologram generation . On the other hand, if holographic data of existing objects is generated optically, but digitally recorded and processed, and brought to display subsequently, this is termed CGH as well. Ultimately, computer generated holography ... Holography is a technique originally invented by Magyars Hungarian physicist Dennis Gabor 1900 1979 ... author F. Wyrowski, R. Hauck and O. Bryngdahl title Computer generated holography hologram repetition ... title Special purpose computer for holography HORN 2 journal Comp. Ph. Comm. volume 93 pages 13 ... method . Ray tracing is perhaps the simplest method of computer generated holography to visualize ... still burden digital holography making potential real time applications with current standard computer ... for CGH creation. References reflist 1 Display technology Category Holography ... more details
and which can be systematically improved. To address this problem, the light front holography approach ... Light Front Holography A First Approximation to QCD journal Physical Review Letters volume 102 issue ... representation with light front holography provides a remarkable first approximation for the mass ... doi 10.1016 j.nuclphysbps.2010.02.010 author G. F. de Teramond and S. J. Brodsky title Light Front Holography ... more details
The term Holographic display might mean a 3D still image presentation a showcase arrangement for a Holography still image a Computer generated holography in form of a still image a 2D or 3D movie or animation presentation a 2D projection onto a glass mounted micro lens or holography foil, see Holographic screen a true 3D display using an on the fly holography image generation device, e.g. the yet experimental flat screen technology Category Holography ... more details
XFH may refer to Hall XFH , a prototype U.S. Navy fighter aircraft of the 1932s X ray fluorescence holography , an imaging method Disambig ... more details
Unreferenced stub auto yes date December 2009 Logical holism is the belief that the world operates in such a way that no part can be known without the whole being known first. See also The doctrine of internal relations Holography Hopefully replaced some day by an infobox. Talk Holography To do infobox Ideas related to holography In optics holography In metaphysics holonomic brain theory , holographic paradigm and The Holographic Universe Michael Talbot s book Proponents Michael Talbot , David Bohm , Karl H. Pribram In quantum mechanics holographic principle the conjecture that all of the information about the realities in a volume of space is present on the surface of that volume Proponents Gerard t Hooft , Leonard Susskind , John Archibald Wheeler John A. Wheeler DEFAULTSORT Logical Holism Category Holism Category Metaphysical theories Category Epistemological theories Category Theories of deduction Philosophy stub ... more details
Frank DeFreitas born January 1, 1956, in Camden, New Jersey is the maintainer of the popular website http www.holoworld.com HoloWorld , aimed at amateur holographers, and author of http www.holoworld.com shoebox about.html Shoebox Holography . He instructs people new to holography how to make simple holograms for example by using a laser pointer. He started working on holography in 1983 with no formal training in science. ref http www.holowiki.com index.php Frank DeFreitas Bio at Holowiki ref He is a 2007 recipient of the http www.holographyfund.org International Holography Fund IHF grant award program, for the documentation of creative holographic artists through internet broadcasting ref http www.holographyfund.org index.php?option com content&task view&id 27 International Holography Fund ref and has provided laser and holography educational programs for schools, ranging from elementary to university level. ref http www.holoworld.com HoloWorld ref Additionally he hosts an internet radio program, HoloTalk ref http holoworld.com holotalk index.html HoloTalk radio show ref and has recently begun publishing a free companion e zine ref http www.holoworld.com ezine Holoworld E zine . ref References reflist Persondata Metadata see Wikipedia Persondata . NAME Defreitas, Frank ALTERNATIVE NAMES SHORT DESCRIPTION DATE OF BIRTH 1956 PLACE OF BIRTH DATE OF DEATH PLACE OF DEATH DEFAULTSORT Defreitas, Frank Category Holography Category Living people Category 1956 births ... more details
CGH may stand for Comparative genomic hybridization Computer generated holography the International Air Transport Association airport code IATA airport code of Congonhas S o Paulo International Airport Changi General Hospital cGh physics disambig de CGH fr CGH it CGH ja CGH ... more details
Vector version available Hologram diagram 3.svg Summary I made this image using paint for the process of explaining something in the Holography page. User Quantumcat Quantumcat 03 10, 16 May 2007 UTC Licensing PD self date May 2007 ... more details
Summary SVG redraw of Hologram diagram 3.png. Previous details were I made this image using paint for the process of explaining something in the Holography page. Quantumcat 03 10, 16 May 2007 UTC Licensing PD self date May 2007 ... more details
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