Patent ID: 7210628
Filing Date: 2007-05-01
Classification: G03H,G11B

Abstract:
1. An apparatus for reading information from a diffractive optics memory having stored therein information located at a plurality of points of said memory and at a plurality of angles at each one of said points so as to form a plurality of packets of information at each one of said points, comprising: a laser generating said coherent light beam; a plurality of dynamic diffractive optical elements configured to shape and angular direct a wavefront of a coherent light beam to said memory at one of said angles of one of said points to reconstruct one of said packets of information; and an acousto-optic device for deflecting toward said dynamic diffractive optical elements said wavefront at a deflection angle with respect to a plane formed by said diffractive optical elements wherein the dynamic diffractive optical elements are arranged with different angles with respect to the diffractive optics memory and the acousto-optic device so that the dynamic diffractive optical elements provide respective minimum and maximum diffractive angles and said wavefront is shaped by phase shifting of said diffractive optical elements.