Pick-up with adaptation

Details Pick-up with adaptation Pick-up with adaptation

1995-05-01

1996-08-27

Ben, Loha

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 54, 369106, 369 4425, 369 4435, 369 58, G11B 700

Patent

active

055508006

ABSTRACT:
In an optical recording apparatus light is directed to and reflected from a recording medium to recover recorded information. The intensity of direct and reflected light is measured and the ratio of the measured values is used to control the intensity of the light source to maintain the intensity of reflected light substantially constant.

REFERENCES:
patent: 4890273 (1989-12-01), Takeuchi et al.
patent: 5050156 (1991-09-01), Barton
patent: 5146449 (1992-09-01), Shimozawa
patent: 5148423 (1992-09-01), Gleim
patent: 5184343 (1993-02-01), Johann et al.
patent: 5251199 (1993-10-01), Utsumi et al.
patent: 5483513 (1996-01-01), Fuji
Japanese Abstract, Japanese Patent No.01-39633A, Kazuhiko Nakane, Method for Driving Recording Medium, (Mitsubishi Electric Corp.) Sep. 2, 1989.
Japanese Abstract, Japanese Patent No. 01-34739A, Yoshiki Nakajima, Servo Circuit for Optical Disk Device, (Mitsubishi Electric Corp.) May 2, 1992.

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