Optical spot position detection device for an optical disk appar

Details Optical spot position detection device for an optical disk appar Optical spot position detection device for an optical disk appar

1989-01-31

1991-08-06

McElheny, Jr., Donald

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4434, 369 54, G11B 7095

Patent

active

050383345

ABSTRACT:
An optical spot position detection device for an optical disk apparatus able to detect a track position of an optical spot on the recording tracks of an optical disk by dividing a space between centers of adjacent recording tracks into four areas and indicating one of the four areas where the optical spot exists so that a control signal for the optical spot can be provided.

REFERENCES:
patent: 4541083 (1985-09-01), Maeda et al.
patent: 4697256 (1987-09-01), Shinkai
patent: 4730290 (1988-03-01), Takasago et al.
patent: 4855977 (1989-08-01), Getrener et al.
patent: 4887253 (1989-12-01), Tateishi
patent: 4901299 (1990-02-01), Nakatsu

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