Static information storage and retrieval – Magnetic bubbles – Guide structure
Patent
1978-06-20
1981-08-18
Corbin, John K.
Static information storage and retrieval
Magnetic bubbles
Guide structure
73603, 350 383, 350 385, 365125, 367 8, G03H 102
Patent
active
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.
Herriau Jean-Pierre
Huignard Jean-Pierre
"Thomson-CSF"
Corbin John K.
Lee John D.
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