Apparatus for detecting a deviation of a reading position for us

Details Apparatus for detecting a deviation of a reading position for us Apparatus for detecting a deviation of a reading position for us

1989-10-04

1992-01-07

Richardson, Robert L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4425, 369 33, 369 43, G11B 700

Patent

active

050797557

ABSTRACT:
An apparatus for detecting a deviation of reading position for use in a disc player. A detection signal of the deviation of reading position is generated if a sync signal to be extracted from the read-out signal is not yielded for a predetermined time period under the presence of a lock detection signal which is produced when the focus servo system is in a locking condition. Owing to this structure, the deviation of the information reading light spot from a proper position is surely detected without enlarging the scale of circuits in the disc player.

REFERENCES:
patent: 4498159 (1985-02-01), Daimon
patent: 4748610 (1988-05-01), Nakata et al.
patent: 5001334 (1991-03-01), Ikeda

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