Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1985-08-05
1987-04-21
Cardillo, Raymond F.
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
369110, 365122, 360114, 360 59, 350371, 364821, G11B 1103, G11B 5012
Patent
active
046601872
ABSTRACT:
A light signal reading method in which a first light beam modulated to a polarized state in accordance with information magnetically recorded on a recording medium is caused to interfere with a second light beam of a frequency different from that of the first light beam, and the information being detected as a variation in the intensity of the interference light, and an apparatus therefor.
REFERENCES:
patent: 4124280 (1978-11-01), Berg et al.
patent: 4409631 (1983-10-01), Matsumoto
patent: 4448494 (1984-05-01), Freyre
patent: 4531196 (1985-07-01), Lin
patent: 4542492 (1985-09-01), Leterme et al.
patent: 4558440 (1985-12-01), Tomita
patent: 4602852 (1986-07-01), Moroz
patent: 4607359 (1986-08-01), Matsubayashi et al.
Berg et al., "Acousto Optical Signal Processing", 1983, pp. 8-13.
Tomita Yasuo
Yoshino Toshihiko
Canon Kabushiki Kaisha
Cardillo Raymond F.
Nguyen Hoa T.
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