Coherent optical correlator (US Patent 4277137)

Patent number: 4277137 Granted: 1981-07-07 Filed: 1978-10-06 Inventors: Juris Upatnieks (Ann Arbor, MI, US); Charles R. Christensen (Athens, AL); Bobby D. Guenther (Huntsville, AL) Assignees: The United States of America as represented by the Secretary of the Army (Washington, DC, US)

Abstract

Reference scenes stored in a filter set containing an array of sets of suimposed, holographic, matched filters are optically correlated with input images displayed on an optically-addressed, liquid crystal, light modulator 34. In operation, a