Recording of both amplitude and phase information of an object using interference between an object wave and a coherent reference wave, both incident on a photo sensitive medium. Coherent illumination of this medium, upon wavefront reconstruction, results in an image having both amplitude and phase characteristics of the original, resulting in three dimensional and other special properties.
A medium for bending and focusing light that uses the interference of monochromatic object and reference waves to record and reproduce multiple two-dimensional images for three-dimensional viewing.
The process of producing holograms, usually requiring a source of coherent light, as from a laser.
Invented in theory by Dr. Dennis Gabor at Imperial College of London in 1948, holograms were not practical until the ruby laser was invented in 1960 by T.A. Mainman of Hughes Aircraft. Today, holograms are made with lasers and produce images that one can practically touch. Some appear to float in space in front of the frame, and they change perspective as you walk left and right. Holograms are monochromatic, and no special viewers or glasses are necessary, although proper lighting is important. To make a hologram, lenthy exposures are required with illumination by laser beams that must be carefully set up to travel a path with precisely positioned mirrors, beam splitters, lenses, and special film. The technology moved rapidly in the 1960s, and in the 1970s a handful of artists began playing in hologram labs. Many of us expected Star Wars-like projections of holograms to be just around the corner, but the technology has not advanced much since then.
the making of and study of holograms (see definition of hologram)
Holography is a technique for creating a three-dimensional image of an object by recording the interference pattern between a light beam diffracted from the object and a reference beam. The image can be reconstructed from this pattern by a suitable optical system.
the branch of optics that deals with the use of coherent light from a laser in order to make a hologram that can then be used to create a three-dimensional image
the photographic process for producing three-dimensional images
"whole drawing". A technique for producing an image (hologram) which conveys a sense of depth, but is not a stereogram in the usual sense of providing fixed binocular parallax information. In outline, this is accomplished by the recreation on a photographic plate of (spectrally restricted) wave fronts of light that appear as if they emanated from the subjects that were holographed, due to the recording of interference patterns between beams of coherent light scattered by the subject matter. Under certain viewing conditions, an image is obtained which is fully three-dimensional in all directions so that a movement of the head presents another aspect of the object (when in stereo viewing this would present a distortion of the same object). The production of such an image, using lasers and mirrors or prisms, is laborious and difficult and requires laboratory conditions of working.
The science dealing with three-dimensional optical recording.
The art of obtaining three-dimensional images known as holograms.
The technique of capturing, on photo-sensitive material, the image of an object which contains the implitude, wavelength and phase of the light reflected by that object. The result is a three dimensional image of that object.
A photographic system that uses laser light to expose film to a pattern developed by the interference pattern of the laser and the reflection. When these films are viewed under specific conditions a 3-D image is visible.
Holography (from the Greek, ÎŒÎ»Î¿Ï‚-holos whole + Î³ÏÎ±Ï†Î®-graphe writing) is the science of producing holograms; it is an advanced form of photography that allows an to be recorded in three dimensions. The technique of holography can also be used to optically store, retrieve, and process information. It is common to confuse volumetric displays with holograms, particularly in science fiction works such as Star Trek, Star Wars, Red Dwarf, and Quantum Leap.