Tracking method in an optical storage

Details Tracking method in an optical storage Tracking method in an optical storage

2005-04-12

2005-04-12

Tran, Thang V. (Department: 2653)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

Reexamination Certificate

active

06879550

ABSTRACT:
The disclosed invention provides a tracking method of an optical storage. When proceeding with tracking, the optical pickup head can be moved constantly and the TE signal can be detected. Then differentiation of the TE signal is obtained. If the differentiation is less than 0, then the TE signal is masked; otherwise, the TE signal is not masked. Therefore, the TE Hysteresis signal can be determined by the TE signal and its differentiation. The TE Hysteresis signal of 0 represents that the laser beam is in the Pit, and then the tracking procedure is finished. Otherwise, the aforementioned steps are repeated until the end of the tracking procedure.

REFERENCES:
patent: 5351222 (1994-09-01), Ikeda et al.
patent: 5909419 (1999-06-01), Kamiyama
patent: 6597224 (2003-07-01), Lin et al.
patent: 6711104 (2004-03-01), Hirashima
patent: 08-045087 (1996-02-01), None

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