专利名称：Filter rotator for coherent optical
correlation system
发明人：Bernard W. Joseph,Aaron D. Gara申请号：US05/869678申请日：19780116公开号：US04174885A公开日：19791120
摘要：In a coherent optical correlation system for detection of object images atunknown angular orientations, a holographic spatial filter in the transform plane of thesystem is rotated until a correlation beam is produced. The spatial filter is mounted on arotating cylinder which carries a first mirror placed in the path of the correlation beamemitted from the filter and disposed to direct the beam toward the axis of rotation ofthe cylinder and a second mirror on the axis and intercepting the beam for directing thecorrelation beam substantially along the axis. A motor drives the cylinder about its axisand an optical encoding device associated with the rotating cylinder provides anelectronic indication of the cylinder orientation at any given instant.
申请人：GENERAL MOTORS CORP
代理人：Warren D. Hill
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