Optical head in an optical memory device

Details Optical head in an optical memory device Optical head in an optical memory device

1988-08-26

1989-11-14

Stephan, Steven L.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 44, 369106, 369116, G11B 700, G11B 2108, G11B 2110

Patent

active

048812161

ABSTRACT:
In an optical head of an optical memory device which records, reproduces or erases information onto or from a recording medium by applying a laser beam to the recording medium, a beam splitter is disposed in an optical path to conduct a portion of the laser beam emitted from a laser device to a light detector. In accordance with a detected value from this light detector, the influence of a stray beam generated in an optical system is removed from a servo error signal.

REFERENCES:
patent: 3944727 (1976-03-01), Elliott
patent: 4051329 (1977-09-01), Blondet
patent: 4145758 (1979-03-01), Drexler
patent: 4357696 (1982-11-01), Bierhoff
patent: 4363116 (1982-12-01), Kleuters
patent: 4446545 (1984-05-01), Dijk
patent: 4549190 (1985-10-01), Ohara
patent: 4627725 (1986-12-01), Nishio
patent: 4642803 (1987-02-01), Drexler
patent: 4654839 (1987-03-01), Endo
Japanese Abstract vol. 6, No. 258, (P-163) (1136), Dec. 17, 1982.
Japanese Abstract vol. 7, No. 160, (P-120) (1305), Jul. 14, 1983.

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