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Compact Holographic Sight

Size reductions of reflex type sights and head -up displays (HUDs) can be achieved with holographic components. For the reflex type sight, the image formed by a high -quality optical system is recorded in a holographic plate with an edge -illuminated reference beam. This hologram reconstructs the original image and duplicates its original quality. The system is compact, consisting of a hologram on a flat glass plate and a compact laser beam expansion optics. The illuminating beam enters the hologram plate through its edge. The laser is remotely located with light guided through a fiber optics cable to the sight. HUDs can also be made more compact by using a pair of gratings attached to a flat glass plate. The plate guides the display to a position in front of the pilot and occupies a small volume.