Holographic display of digital images

An optical hologram is a two-dimensional photographic plate which preserves information about the wavefront of coherent light which is diffracted from an object and is incident upon the plate. A properly illuminated hologram yields a three-dimensional wave-front identical to that from the original object, and thus the observed image is an exact reconstruction of the object. The observed image has all of the usual optical properties associated with real three-dimensional objects; e.g., parallax and perspective.