Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2007-02-13
2007-02-13
Huber, Paul (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S094000
Reexamination Certificate
active
11200570
ABSTRACT:
A recording and reproduction apparatus for a recording medium including a plurality of information layers includes a focusing signal generation section for generating focusing signals F+ and F− in accordance with a light beam reflected by the recording medium; a focusing control section for generating a focusing error signal in accordance with a difference between the focusing signals F+ and F−, and performing focusing control for maintaining a distance between a focal point of the light beam and a target information layer within a prescribed tolerable range; and a gain setting section for setting a focusing servo gain in accordance with the focusing error signal. The focusing signal generation section generates the focusing signals F+ F− so that values of components thereof based on the light beam reflected by an information layer other than the target information layer are substantially equal while focusing control is being performed.
REFERENCES:
patent: 5764620 (1998-06-01), Satoh et al.
patent: 5831953 (1998-11-01), Numata
patent: 5859824 (1999-01-01), Izumi et al.
patent: 5978328 (1999-11-01), Tanaka
patent: 6091690 (2000-07-01), Sano et al.
patent: 6101156 (2000-08-01), Tanaka et al.
patent: 6307820 (2001-10-01), Takeya et al.
patent: 6728174 (2004-04-01), Sako et al.
Huber Paul
Renner , Otto, Boisselle & Sklar, LLP
LandOfFree
Recording/reproduction apparatus and recording/reproduction... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Recording/reproduction apparatus and recording/reproduction..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recording/reproduction apparatus and recording/reproduction... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3810535