Patent ID: 7924484

Claim:
A hologram to be encoded into a hologram-bearing medium of a display device, the display device comprising: an optical system; at least one light source; and a hologram-bearing medium; the optical system imaging the light source into an image plane of the light source; the hologram being generated by a computer processor; a sequence of holograms forming a video hologram to be displayed by the device to enable video holography; the hologram comprising a region with information needed to reconstruct a single point of a three dimensional scene, the point being visible from a defined viewing position of an observer's eye being located approximately at the image plane of the light source, the region being: (a) encoded with information for that single point in the reconstructed scene; (b) the only region in the hologram encoded with information for that point; (c) restricted in size to form a portion of the entire hologram, the size being such that multiple reconstructions of that point caused by higher diffraction orders are not visible at the defined viewing position; and (d) variable in position and size, the position and size of the region depending on the location of the point and on the location of the defined viewing position.