Patent ID: 6157474
Filing Date: 2000-12-05
Classification: G02B,G03H,H04N

Abstract:
A display device comprising:a holographic optical element including at least two sets of regions, each set of regions having at least one hologram region, at least one said hologram region of a first of said sets of regions being interleaved or overlapping with at least one adjacent hologram region of a second of said sets of regions, andbeing constructed such that light incident on each set of regions is diffracted so as to construct a respective one or more of a plurality of real or virtual images of a diffuse light source; andimage generating means including a plurality of image elements;wherein the holographic optical element and its hologram regions are disposed and designed such that light diffracted by the first set of regions passes through a corresponding first set of image elements and such that light diffracted by the second set of regions passes through a corresponding second set of image elements.