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Definition: holography from Philip's Encyclopedia

Process of making a 3-D hologram. One or more photographs form on a single film or plate by interference between two parts of a split laser beam. The photograph appears as a flat pattern until light hits the plate in the correct position; it then becomes a 3-D image. British physicist Dennis Gabor proposed the theory of holography in 1947, but it only became practicable with the invention of the laser.

Holography

From Encyclopedia of Science and Technology Communication
Holography is the science of recording three-dimensional information on a piece of two-dimensional film. It does this by recording the light that is scattered from an object in such a way that this pattern of light can be reconstructed when the hologram is viewed. The word holography comes from the Greek words holos , meaning “whole,” and gramma , meaning “message.” Holography is one of several techniques for representing images of objects in three dimensions that are attractive to science communicators working in science centers, museums, and similar institutions. In addition, teaching about holography provides an opportunity to convey important concepts in physics. Dennis Gábor (1900-1979), a physicist born in Hungary, received the Nobel Prize in Physics in 1971 for his work on holography. Gábor was limited by the light sources available at the time, which consisted of mercury arc lamps that lacked the coherence necessary to produce high-quality holograms. Holography was given a…
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Full text Article holography

From The Penguin Dictionary of Physics
A technique for the reproduction of a stereoscopic image without cameras or lenses. A monochromatic, coherent, and highly collimated beam of light from a LASER is separated into two beams, one of which is directed to a photographic plate coated with a film of high resolution. The second beam hits…
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Full text Article holography

From The Thames & Hudson Dictionary of Art Terms
The process of recording an image on photo-sensitive material, without the use of a lens, in the form of an interference pattern produced by splitting a beam from a laser. When the resulting pattern is scanned by another laser, or even by a concentrated beam of light from a normal source, the image…
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Full text Article holography

From The Columbia Encyclopedia
(hŏlŏg'rӘfē, hō–), method of reproducing a three-dimensional image of an object by means of light wave patterns recorded on a photographic plate or film. Holography is sometimes called lensless photography because no lenses are used to form the image. The plate or film with the recorded wave…
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Full text Article Holography

From Encyclopedia of Emerging Industries
323111 332999 561621 While people could not yet use holography to re-enact scenes from their favorite novels as done on Star Trek , holographic technology was boldly going where no one had gone before. The technology was expanding into numerous alien territories, such as solar weather forecasting, …
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Full text Article holography

From The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide
Method of producing three-dimensional (3-D) images, called holograms , by means of laser light. Holography uses a photographic technique (involving the splitting of a laser beam into two beams) to produce a picture, or hologram, that contains 3-D information about the object photographed. Some…
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Full text Article holography

From Britannica Concise Encyclopedia
Method of recording or reproducing a three-dimensional image, or hologram, by means of a pattern of interference produced using a laser beam. To create a hologram, a beam of coherent light (a laser) is split; half the beam falls on a recording medium (such as a photographic plate) unaltered, and the…
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Full text Article Holography

From A Dictionary of the Avant-Gardes
(c. 1947) A technology new to the 1960s, drawing upon scientific discoveries of the late 1940s, holography superficially resembles photography in representing an image on two-dimensional photoemulsion (film), but it differs in capturing an image in different situations (and thus, at least…
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Full text Article holography

From The American Heritage Student Science Dictionary
holography
A method of making a three-dimensional image of an object by using a beam of light from a laser. The laser light beam is split into two beams that are directed by mirrors so that one beam reflects of the object onto a photographic plate while the other beam…
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Full text Article Holography

From The Big Idea: How Breakthroughs of the Past Shape the Future Full text Article Information & Communication
Date: 1947 Holography, invented in 1947 by Hungarian physicist Dennis Gabor, is a way of reproducing a recorded image so that it appears three-dimensional. First, light scattered from a subject is captured by a photographic plate. Then, another beam of light is reflected directly onto the plate, …
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Full text Article Holography

From Dictionary of Media and Communication Studies
With the invention of the laser in 1960 an intriguing new form of three-dimensional photography, named holography, became possible. Though the theory originated with Dennis Gabor as early as 1947, development was not possible until an intense source of ‘coherent’ light became available, which the…
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