ACOUSTO-OPTICAL IMAGERY SYSTEM BASED ON COHERENT HOLOGRAPHIC DETECTION IN REAL TIME

摘要

AN ACOUSTO-OPTICAL IMAGERY SYSTEM BASED ON COHERENT HOLOGRAPHIC DETECTION IN REAL TIME. of the disclosure The invention relates to the acousto-optical imagery of objects transmitting ultrasonic waves ; an optical image diffracted by the action of an ultrasonic wave is detected by coherent detection in a electro-optical and photoconductive holographic recording material under an applied field by holographic recording of the interferences between the diffracted order to be imaged formed by the optical wave of pulsation .omega.o + .omega.s (or .omega.o - .omega.s) and an optical reference wave having the same pulsations. Imagery is effected in real time by restoration of the object wave by a reading wave having the same pulsation as the reference wave.