Optical disk recording/reproducing method and apparatus for prev

Details Optical disk recording/reproducing method and apparatus for prev Optical disk recording/reproducing method and apparatus for prev

1999-04-13

2000-06-06

Dinh, Tan

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4437, 369118, G11B 7125

Patent

active

060727624

ABSTRACT:
Between a semiconductor laser diode and an optical disk, a collimator lens for collimating a laser beam output from the semiconductor laser diode, a liquid crystal optical shutter for attenuating the collimated beam having passed through the collimator lens, and a beam splitter for splitting reflected light from the optical disk are disposed. In addition, a collective lens for collecting the collimated beam obtained by the collimator lens on a data holding surface of the optical disk is further disposed.

REFERENCES:
patent: 5319481 (1994-06-01), Fergason
patent: 5349175 (1994-09-01), Prikryl
patent: 5606541 (1997-02-01), Finkelstein et al.
patent: 5754571 (1998-05-01), Endoh et al.
patent: 5790433 (1998-08-01), Barenboim et al.
Patent Abstracts of Japan, vol. 018, No. 074 (P-1688), Feb. 7, 1994, JP 05 282699, Published Oct. 29, 1993.
Patent Abstracts of Japan, vol. 018, No. 522 (P-1808), Sep. 30, 1994, JP 06 180851, Published Jun. 28, 1994.

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