Acousto-optical imagery system based on coherent holographic det

Static information storage and retrieval – Magnetic bubbles – Guide structure

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73603, 350 383, 350 385, 365125, 367 8, G03H 102

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042843243

ABSTRACT:
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 an 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..sub.o +.omega..sub.s (or .omega..sub.o -.omega..sub.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.

REFERENCES:
patent: 3633407 (1972-01-01), Whitman
patent: 3745812 (1973-07-01), Korpel
patent: 3879989 (1975-04-01), Brenden
patent: 3886488 (1975-05-01), Bossaert et al.
patent: 4138189 (1979-02-01), Huignard et al.
Collins et al., "Pulse Compression by Bragg Diffraction of Light . . .", Appl. Phys. Ltrs., vol. 11, No. 7, Oct. 1967, pp. 240-242.
Micheron et al., "High Photosensitivity Volume Hologram Recording . . .", Optics Commun., vol. 18, No. 2, Jul. 1976, pp. 216-217.

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