30-08-2017, 12:11 PM
A hologram (pronounced HOL-o-gram) is a three-dimensional image, created with photographic projection. The term is taken from the Greek words holos (integer) and gramma (message). Unlike 3-D or virtual reality on a two-dimensional computer screen, a hologram is a truly three-dimensional and free image that does not simulate spatial depth or requires a special display device. Theoretically, holograms could one day be transmitted electronically to a special display device in your home and business. The theory of holography was developed by Dennis Gabor in 1947. The development of laser technology made possible holography.
Holography is the science and practice of making holograms. Typically, a hologram is a photographic recording of a light field, rather than an image formed by a lens, and is used to display a fully three-dimensional image of the holographic subject, which is viewed without the aid of special lenses or other intermediate optics . The hologram itself is not an image and is usually unintelligible when viewed under diffuse ambient light. It is a coding of the light field as a pattern of interference of seemingly random variations in the opacity, density or surface profile of the photographic medium. When properly lit, the interference pattern diffracts light into a reproduction of the original luminous field and the objects therein appear to be there, displaying visual indications of depth such as parallax and perspective that change realistically with any change in the relative position of the observer.
Holography is the science and practice of making holograms. Typically, a hologram is a photographic recording of a light field, rather than an image formed by a lens, and is used to display a fully three-dimensional image of the holographic subject, which is viewed without the aid of special lenses or other intermediate optics . The hologram itself is not an image and is usually unintelligible when viewed under diffuse ambient light. It is a coding of the light field as a pattern of interference of seemingly random variations in the opacity, density or surface profile of the photographic medium. When properly lit, the interference pattern diffracts light into a reproduction of the original luminous field and the objects therein appear to be there, displaying visual indications of depth such as parallax and perspective that change realistically with any change in the relative position of the observer.