Visual Encyclopedia

Holography

Holography is the science and practice of making holograms. Typically, a hologram is a photographic recording of a light field, rather than of an image formed by a lens, and it is used to display a fully three-dimensional image of the holographed subject, which is seen without the aid of special glasses or other intermediate optics. The hologram itself is not an image and it is usually unintelligible when viewed under diffuse ambient light. It is an encoding of the light field as an interference pattern of seemingly random variations in the opacity, density, or surface profile of the photographic medium. When suitably lit, the interference pattern diffracts the light into a reproduction of the original light field and the objects that were in it appear to still be there, exhibiting visual depth cues such as parallax and perspective that change realistically with any change in the relative position of the observer.

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Holograms dancing around people inside of a visual art display. Super cool.

Contributed by Kathryn Vercillo

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Today, Employees in some phone carriers such as AT&T, Verizon, and T-Mobile use Ipads to work with customers through customer services. Also, Apple Inc and Samsung Inc are competing each other to invent several smart things such as a smart TV and a smart watch. They can invent a smart belt and unite it with the hologram technology, so those employees in phone carriers do not need to carry Ipads any time. Instead, they can wear smart belts to serve the customers through 3D screen.

Contributed by Mark Ha

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