Optical disk player capable of distinguishing external disturban

Details Optical disk player capable of distinguishing external disturban Optical disk player capable of distinguishing external disturban

1985-07-31

1988-01-26

Richardson, Robert L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 45, 250201, G11B 700

Patent

active

047220791

ABSTRACT:
In a three-beam type optical data disk player, beam output disturbances due to an external disturbance such as vibration and the beam output disturbances due to a local defect on the disk are distinguished from each other, and the servo gain is adjusted according to whether the beam output disturbance is due to the external disturbance or due to the local defect, so that the main beam is controlled to correctly follow the track at all times.

REFERENCES:
patent: 4310912 (1982-01-01), Kikuchi

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