Recording and reproducing apparatus using opto-magneto media

Details Recording and reproducing apparatus using opto-magneto media Recording and reproducing apparatus using opto-magneto media

1990-05-24

1993-05-04

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 32, 369 48, 369 4428, 369 13, 360114, G11B 700, G11B 7095, G11B 1112

Patent

active

052087921

ABSTRACT:
An apparatus is provided for recording and reproducing information signals on an opto-magnetic disk at a high speed using plural light beams. The phase relation between the information signals is fixed when they are simultaneously recorded and reproduced on plural tracks of the disk. The overwrite of simultaneously performing erasing and recording of the information signals is executed using the plural beams.

REFERENCES:
patent: 4507763 (1985-03-01), Kato
patent: 4642703 (1987-02-01), Endo
patent: 4962301 (1990-10-01), Rokutan
patent: 4969137 (1990-11-01), Sugiyama et al.
patent: 4998231 (1991-03-01), Watanabe et al.
patent: 5007039 (1991-04-01), Sakemoto et al.
patent: 5043960 (1991-08-01), Nakao et al.
SPIE Optical Data Storage Topical Meeting, vol. 1078, pp. 98-104, "Multi-beam magneto-optical disk drive for parallel read/write operation", Los Angeles, California.
Patent Abstracts of Japan, vol. 11, No. 93 (P-559) Mar. 1987, & JP-A-61 243975 (Sony Corp) Oct. 1986.
Patent Abstracts of Japan, vol. 11, No. 9, (P-534) Jan. 1987, & JP-A-61 184744 (Canon Inc) Aug. 1986.
Patent Abstracts of Japan, vol. 9, No. 239 (P-391) Sep. 1985 & JP-A-60 093646 (Suwa Seikosha KK) May 1985.

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