The 1971 Nobel Prize in Physics was to British-Hungarian scientist Dennis Gabor (Gábor Dénes in Hungarian)[1][2] "for his creation and development of the holographic technique." [3]
His work, completed in the late 1940s, was based upon the ground-breaking work of earlier researchers, such as Mieczysaw Wolfke in 1920 and William Lawrence Bragg in 1939, in the field of X-ray microscopy.
[4] The British Thomson-Houston Company (BTH) in Rugby, England, made this unanticipated finding as a consequence of work on upgrading electron microscopes, and the business submitted a patent application in December 1947. (patent GB685286). The earliest form of the method, known as electron holography, is still employed in electron microscopy. However, optical holography did not fully advance until the invention of the laser in 1960. The Greek terms o (holos; "whole") and (graph; "writing" or "drawing") are where the word "holography" originates.
A hologram is a representation of an interference pattern that uses diffraction to replicate a three-dimensional light field. A generated image from the replicated light field can retain the depth, parallax, and other characteristics of the original scene. [5] An picture created by a lens is not what makes up a hologram; rather, it is a photographic recording of a light field. When seen in diffuse ambient light, the holographic medium, such as the item created by a holographic process (which is also referred to as a hologram), is typically incomprehensible. The light field is encoded as an interference pattern of changes in the density, opacity, or surface profile of the photographic medium. When properly lighted, the interference pattern diffracts the light into a faithful representation of the original light field, and the objects that were in it display realistically changing visual depth cues like parallax and perspective as a result of the various viewing angles. In other words, the topic is seen from comparable perspectives in all views of the photograph. In this sense, holograms are actual three-dimensional pictures rather than merely giving the appearance of depth.
Text with a horizontal symmetry, by Dieter Jung
The invention of the laser allowed Yuri Denisyuk in the Soviet Union[6] and Emmett Leith and Juris Upatnieks at the University of Michigan in the United States to create the first functional optical holograms that captured three-dimensional objects in 1962.
[7] The recording material for early holograms was silver halide photographic emulsions. They weren't very effective since the grating they formed absorbed much of the light that struck it. It was possible to create far more effective holograms thanks to various techniques for "bleaching," or transforming transmission variance into refractive index variation. [8] [9] [10]
For optical holography to capture the light field, a laser light is required. In the past, holography required powerful, expensive lasers, but nowadays, low-cost laser diodes that are mass-produced and commonly used in other applications, like DVD recorders, can be used to create holograms. This has made holography much more accessible to dedicated hobbyists, low-budget researchers, and artists. The whole scene captured during the recording may be replicated in microscopic detail. However, it is possible to view the 3D image without laser light. In order to observe the hologram and, in some situations, create it without the requirement for laser illumination, significant picture quality concessions are typically needed. In order to avoid using potentially lethal high-powered pulsed lasers to optically "freeze" moving people as precisely as the very motion-intolerant holographic recording method required, holographic portraiture frequently turns to a non-holographic intermediate imaging technique. Today, holograms may even depict inexistent objects or settings fully using computer-generated imagery. While technologies for showing moving sceneries on a holographic volumetric display are currently being developed, the majority of holograms created are of static items. [11] [12][13]
Holography is also used to a wide range of different wave forms. The Greek terms o (holos; "whole") and (graph; "writing" or "drawing") are the origin of the word holography.
A hologram is a representation of an interference pattern that uses diffraction to replicate a three-dimensional light field. In contrast to a lens-based picture, a hologram is a photographic representation of a light field. It may produce an image that retains the depth, parallax, and other characteristics of the original scene. When seen in diffuse ambient light, the holographic medium, such as the item created by a holographic process (which is also referred to as a hologram), is typically incomprehensible. The light field is encoded as an interference pattern of changes in the density, opacity, or surface profile of the photographic medium. When properly lighted, the interference pattern diffracts the light into a faithful representation of the original light field, and the objects that were in it display realistically changing visual depth cues like parallax and perspective as a result of the various viewing angles. In other words, the topic is seen from comparable perspectives in all views of the photograph. In this sense, holograms are actual three-dimensional pictures rather than merely giving the appearance of depth.
Text with a horizontal symmetry, by Dieter Jung
Emmett Leith and Juris Upatnieks at the University of Michigan in the United States[7] and Yuri Denisyuk in the Soviet Union[6] created the first practical optical holograms that recorded three-dimensional objects in 1962. Earlier holograms used silver halide photographic emulsions as the recording medium. They weren't very effective since the grating they formed absorbed much of the light that struck it. It was possible to create considerably more effective holograms by using a variety of "bleaching" techniques that changed the transmission fluctuation into a refractive index variation.[8][9][10]
For optical holography to capture the light field, a laser light is required. In the past, holography required powerful, expensive lasers, but nowadays, low-cost laser diodes that are mass-produced and commonly used in other applications, like DVD recorders, can be used to create holograms. This has made holography much more accessible to dedicated hobbyists, low-budget researchers, and artists. The whole scene captured during the recording may be replicated in microscopic detail. However, it is possible to view the 3D image without laser light. In order to observe the hologram and, in some situations, create it without the requirement for laser illumination, significant picture quality concessions are typically needed. In order to avoid using potentially lethal high-powered pulsed lasers to optically "freeze" moving people as precisely as the very motion-intolerant holographic recording method required, holographic portraiture frequently turns to a non-holographic intermediate imaging technique. Today, holograms may even depict inexistent objects or settings fully using computer-generated imagery. Although technologies for showing dynamic sceneries on a holographic volumetric display are currently being developed, the majority of holograms created are of static objects.[11][12][13]
Holography is also used to a wide range of different wave forms. the photographic medium's opacity, density, or surface profile. When properly lighted, the interference pattern diffracts the light into a faithful representation of the original light field, and the objects that were in it display realistically changing visual depth cues like parallax and perspective as a result of the various viewing angles. In other words, the topic is seen from comparable perspectives in all views of the photograph. In this sense, holograms are actual three-dimensional pictures rather than merely giving the appearance of depth.
Text with a horizontal symmetry, by Dieter Jung
Emmett Leith and Juris Upatnieks at the University of Michigan in the United States[7] and Yuri Denisyuk in the Soviet Union[6] created the first practical optical holograms that recorded three-dimensional objects in 1962. Earlier holograms used silver halide photographic emulsions as the recording medium. They weren't very effective since the grating they formed absorbed much of the light that struck it. It was possible to create considerably more effective holograms by using a variety of "bleaching" techniques that changed the transmission fluctuation into a refractive index variation.[8][9][10]
For optical holography to capture the light field, a laser light is required. In the past, holography required powerful, expensive lasers, but nowadays, low-cost laser diodes that are mass-produced and commonly used in other applications, like DVD recorders, can be used to create holograms. This has made holography much more accessible to dedicated hobbyists, low-budget researchers, and artists. The whole scene captured during the recording may be replicated in microscopic detail. However, it is possible to view the 3D image without laser light.
In order to observe the hologram and, in some situations, create it without the requirement for laser illumination, significant picture quality concessions are typically needed. In order to avoid using potentially lethal high-powered pulsed lasers to optically "freeze" moving people as precisely as the very motion-intolerant holographic recording method required, holographic portraiture frequently turns to a non-holographic intermediate imaging technique. Today, holograms may even depict inexistent objects or settings fully using computer-generated imagery. While technologies for showing moving sceneries on a holographic volumetric display are currently being developed, the majority of holograms created are of static items. [11] [12] [13]
Holography is also used to a wide range of different wave forms.
