Optical disc apparatus

Details Optical disc apparatus Optical disc apparatus

2006-08-15

2009-06-23

Huber, Paul (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044320, C369S053280

Reexamination Certificate

active

07551529

ABSTRACT:
In an optical disc apparatus, the amplitude level of a focus error signal for performing focus search is measured, and in order to bring the measured amplitude level of the focus error signal to a target value, gains of focus servo drive amplifiers which amplify respective detection signals from four respective divided detection regions of an optical detector are set as initial values. As a result, the amplitude level of the focus error signal is adjusted at the target value. Next, the amplitude levels of the detection signals from the respective detection regions are measured, and the gains of the respective focus servo drive amplifiers are adjusted individually so that crosstalk can be cancelled based on the measured amplitude levels of the detection signals.

REFERENCES:
patent: 5255252 (1993-10-01), Katayama
patent: 63-173233 (1988-07-01), None
patent: 04-113523 (1992-04-01), None
patent: 8-335323 (1996-12-01), None
patent: 9-320178 (1997-12-01), None
patent: A-2002-032924 (2002-01-01), None
patent: 2003-123294 (2003-04-01), None
patent: 2004-87054 (2004-03-01), None

Affiliated with

Also associated with

Rating

Optical disc apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical disc apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disc apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4075850