Holographic laser beam scanners utilizing an auxiliary reflector

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Abstract
Holographic laser beam scanners utilizing a main substrate of simple geometry and an auxiliary reflector are described. The design parameters have been defined and the resolution capabilities analyzed. An experimental scanner using a flat main substrate and a convex auxiliary reflector has been constructed. Diffraction limited reconstructions have been obtained throughout the entire scanning range. A method for dynamically stabilizing the scanning beam is described. Since the main substrate on which the holograms are recorded is either flat or slightly concave, they lend themselves to low cost replication.