Static information storage and retrieval – Information masking – Polarization
Patent
1985-10-29
1990-05-01
Moffitt, James W.
Static information storage and retrieval
Information masking
Polarization
360 59, 369 13, G11C 1306
Patent
active
049224549
ABSTRACT:
A magneto-optical memory medium of a laminar structure comprising at least one non-magnetic layer, and a plurality of magneto-optical storage layers separated from each other by corresponding non-magnetic layers, and wherein information is read out from a selected one of the storage layers by detecting a change in the Kerr rotation angle of a corresponding one of light beams of different wavelengths applied to the memory medium, which change depends upon magneto-optical anisotropy of the storage layers. A thickness of one of the storage layers is determined so that the change in the Kerr rotation angle of each of the light beams repesents the anisotropy of the corresponding storage layer, irrespective of the anisotropy of the other storage layers. Also disclosed is a magneto-optical apparatus for writing and/or reading information on or from the desired magneto-optical layers.
REFERENCES:
patent: 3235672 (1966-02-01), Beguin
patent: 3650601 (1972-03-01), Bierlein
patent: 3665483 (1972-05-01), Becker et al.
patent: 3781905 (1973-12-01), Bernal et al.
patent: 4219704 (1980-08-01), Russell
patent: 4546463 (1985-10-01), Opheij et al.
patent: 4559573 (1985-12-01), Tanaka et al.
patent: 4612587 (1986-09-01), Kaneko et al.
patent: 4631617 (1986-12-01), Tanaka et al.
patent: 4660190 (1987-04-01), Fujii et al.
patent: 4670865 (1987-06-01), Hatano
IBM Technical Disclosure Bulletin, "Flying Optical Head for Disc Applications", vol. 23, No. 7A, Dec. 1980, pp. 2994-2995, by E. G. Lean.
IBM Technical Disclosure Bulletin, "Photochromic Disk File", by B. Kazan, vol. 14, No. 5, Oct. 1971, pp. 1362-1364.
IBM Technical Disclosure Bulletin, "GaAs Laser Array and Fiber-Optic Detector Array for Disc Application", vol. 23, No. 7A, Dec. 1980, pp. 2992-2993, by E. G. Lean.
IEEE Transactions on Magnetics, vol. MAG-3, No. 3, Sep. 1967, pp. 433-452.
Patent Abstracts of Japan, vol. 6, No. 34, (P-104)(912), Mar. 2, 1982.
Patent Abstracts of Japan, vol. 9, No. 86, (P-349)(1809), Apr. 16, 1985.
Patent Abstracts of Japan, vol. 9, No. 86, (P-349)(1809), Apr. 16, 1985.
Patent Abstracts of Japan, vol. 6, No. 82, (P-116)(960), May 20, 1982.
Brother Kogyo Kabushiki Kaisha
Moffitt James W.
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