Tracking method and device for use with an optical recording med

Details Tracking method and device for use with an optical recording med Tracking method and device for use with an optical recording med

1996-05-29

1999-08-10

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4441, 369 4429, G11B 7095

Patent

active

059369205

ABSTRACT:
During recording of data on a recording medium, tracking is performed using auxiliary beams to refer to guide tracks as done in the conventional three-beam method. During reproduction of data from the recording medium, tracking is performed using a main beam to refer to a data pit recorded in a recording track in accordance with the push-pull method. In addition, there are provided two tracking control circuits based on the three-beam method and push-pull method, and the use of tracking control signals based on the three-beam and push-pull methods that are output from the two circuits is selected via a switch.

REFERENCES:
patent: 5153863 (1992-10-01), Noda et al.
patent: 5363358 (1994-11-01), Yanagawa

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