Optical disk player having tilt servo control absent tilt sensor

Details Optical disk player having tilt servo control absent tilt sensor Optical disk player having tilt servo control absent tilt sensor

1991-02-21

1993-04-27

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4432, G11B 709

Patent

active

052068480

ABSTRACT:
An optical disk player provided with tilt servo unit. A quadrant type photodetector is used as disk tilt detecting means, and the push-pull output is issued as a disk tilt detecting signal. By simultaneous use of the photodetector of the pickup, there is no need to use special-purpose tilt sensor, and this contributes to compact design of the pickup and to the reduction of manufacturing cost.

REFERENCES:
patent: 4544838 (1985-10-01), Musha et al.
patent: 4608680 (1986-08-01), Yano
patent: 4744069 (1988-05-01), Sugiyama et al.
patent: 4858216 (1989-08-01), Kamiya

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