Method and apparatus for beam-track alignment in optical disk ap

Details Method and apparatus for beam-track alignment in optical disk ap Method and apparatus for beam-track alignment in optical disk ap

1986-11-20

1989-01-03

Faber, Alan

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 32, G11B 7095

Patent

active

047962461

ABSTRACT:
A method of beam-track alignment in an optical disk apparatus comprises detecting the velocity v of a beam spot moving in parallel to the surface of an optical disk and traversing a target track in a direction orthogonal with respect to the track, detecting the displacement x given by the distance between the center of the target track and the present position of the beam spot, and starting tracking control (position control) when the detected values of v and x satisfies a predetermined condition.

REFERENCES:
patent: 4435797 (1984-03-01), Hsieh
patent: 4615023 (1986-09-01), Inada
patent: 4630250 (1986-12-01), Nonomura

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