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Holography (other)
Holography is a technique for recording and reconstruction of wavefronts. Holography and holographic may also refer to: * Holograph, a document written entirely in the handwriting of the person who signed it * Holographic principle, a conjecture of quantum gravity *Holographic weapon sight A holographic weapon sight or holographic diffraction sight is a non- magnifying gunsight that allows the user to look through a glass optical window and see a holographic reticle image superimposed at a distance on the field of view. The hologram ..., non-magnifying gun sight * Windows Holographic, augmented reality computing platform See also * Hologram (other) {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holography
Holography is a technique that enables a wavefront to be recorded and later re-constructed. Holography is best known as a method of generating real three-dimensional images, but it also has a wide range of other applications. In principle, it is possible to make a hologram for any type of wave. A hologram is made by superimposing a second wavefront (normally called the reference beam) on the wavefront of interest, thereby generating an interference pattern which is recorded on a physical medium. When only the second wavefront illuminates the interference pattern, it is diffracted to recreate the original wavefront. Holograms can also be computer-generated by modelling the two wavefronts and adding them together digitally. The resulting digital image is then printed onto a suitable mask or film and illuminated by a suitable source to reconstruct the wavefront of interest. Overview and history The Hungarian- British physicist Dennis Gabor (in Hungarian: ''Gábor Déne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holograph
An autograph or holograph is a manuscript or document written in its author's or composer's hand. The meaning of autograph as a document penned entirely by the author of its content, as opposed to a typeset document or one written by a copyist or scribe other than the author, overlaps with that of holograph. Autograph manuscripts are studied by scholars, and can become collectable objects. Holographic documents have, in some jurisdictions, a specific legal standing. Terminology According to ''The Oxford English Minidictionary'', an autograph is, apart from its meaning as a signature, a "manuscript in the author's handwriting," while a holograph is a "(document) written wholly in the handwriting of the person in whose name it appears." In the 1911 edition of the ''Encyclopædia Britannica'', Edward Maunde Thompson gives two common meanings of the word autograph as it applies to documents: "a document signed by the person from whom it emanates" and "one written entirely in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holographic Principle
The holographic principle is an axiom in string theories and a supposed property of quantum gravity that states that the description of a volume of space can be thought of as encoded on a lower-dimensional boundary to the region — such as a light-like boundary like a gravitational horizon. First proposed by Gerard 't Hooft, it was given a precise string-theory interpretation by Leonard Susskind, who combined his ideas with previous ones of 't Hooft and Charles Thorn. Leonard Susskind said, “The three-dimensional world of ordinary experience––the universe filled with galaxies, stars, planets, houses, boulders, and people––is a hologram, an image of reality coded on a distant two-dimensional surface." As pointed out by Raphael Bousso, Thorn observed in 1978 that string theory admits a lower-dimensional description in which gravity emerges from it in what would now be called a holographic way. The prime example of holography is the AdS/CFT correspondence. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holographic Weapon Sight
A holographic weapon sight or holographic diffraction sight is a non- magnifying gunsight that allows the user to look through a glass optical window and see a holographic reticle image superimposed at a distance on the field of view. The hologram of the reticle is built into the window and is illuminated by a laser diode. History The first-generation holographic sight was introduced by EOTech—then an ERIM subsidiary—at the 1996 SHOT Show,Jane's international defence review: IDR.: Volume 34, page 76 under the trade name HoloSight by Bushnell (with whom the company was partnered with at the time), initially aiming for the civilian sport shooting and hunting market. It won the Optic of the Year Award from the Shooting Industry Academy of Excellence. EOTech was the only company that manufactured holographic sights until early 2017 (possibly January 2017), when Vortex introduced the Razor AMG UH-1 into the market as a competing product. Design Holographic weapon sights us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windows Holographic
Windows Mixed Reality is a platform introduced as part of the Windows 10 and 11 operating system, which provides augmented reality and virtual reality experiences with compatible head-mounted displays. Its flagship device, Microsoft HoloLens, was announced at the "Windows 10: The Next Chapter" press event on January 21, 2015. The HoloLens provides an augmented reality experience where a live presentation of physical real-world elements is incorporated with that of virtual elements (referred to as "holograms" by Microsoft) such that they are perceived to exist together in a shared environment. A variant of Windows for augmented reality computers (which augment a real-world physical environment with virtual elements) Windows Mixed Reality features an augmented-reality operating environment in which any Universal Windows Platform app can run. The platform is also used for virtual reality headsets designed for use on the Windows 10 Fall Creators Update, which are built to specificati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
