REAL-TIME OPTICAL-IMAGE PROCESSING BY SYNTHESIS OF THE COHERENCE FUNCTION USING REAL-TIME HOLOGRAPHY

We have proposed an optical information processing technique by synthe sis of the optical coherence function utilizing direct frequency modul ation of a laser diode, In the former system, however, a silver halide holographic plate was used, so wet developing process was required. I n this letter, realtime holography is adopted by using a liquid crysta l spatial light modulator, which enables real-time processing, This sy stem does not require any mechanically moving part nor electrical calc ulation in the processing procedure. Selective extraction of a 2-dimen sional image from a 3-dimensional object is successfully demonstrated in real-time.