Method and apparatus for recording or reproducing information in

Details Method and apparatus for recording or reproducing information in Method and apparatus for recording or reproducing information in

1984-11-13

1989-04-11

Faber, Alan

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 54, 369 58, 369111, G11B 709

Patent

active

048212512

ABSTRACT:
An apparatus for recording or reproducing information in or from an optical disc, has a semiconductor laser system, a split photosensor, a signal processing circuit, and a disc controller with a CPU and a memory. Defective sectors of the optical disc are detected, and information recording/reproduction is performed for only nondefective sectors.

REFERENCES:
patent: Re31069 (1982-10-01), Chang et al.
patent: 4145758 (1979-03-01), Drexler et al.
patent: 4214280 (1980-07-01), Halfhill et al.
patent: 4546462 (1985-10-01), Koishi et al.
patent: 4571716 (1986-02-01), Szerlip
patent: 4623993 (1986-11-01), Schlosser
patent: 4701897 (1987-10-01), Nakagawa

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