Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2007-05-08
2007-05-08
Korzuch, Wiliam (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
Reexamination Certificate
active
10659392
ABSTRACT:
The optical disc apparatus comprises a convergence lens12, a light detection device14for outputting a first and a second detection signals after detecting reflected optical beam area by area, an actuator13for shifting the convergence lens12, a gain balance circuit30for changing a gain balance of the first and the second detection signals, an addition circuit123for outputting the addition signal AS after adding the first detection signal to the second detection signal in response to the shift in lens position and the change in gain balance made by the gain balance circuit30and the actuator13, and an addition signal measurement unit361and a gain balance adjustment unit362operable to obtain the addition signal AS from the addition circuit123, specify the gain balance that equalizes the detection sensitivities in the respective areas of the light detection device14based on the obtained result, and control the gain balance circuit30that realizes the determined gain balance.
REFERENCES:
patent: 5629911 (1997-05-01), Sasaki
patent: 5841465 (1998-11-01), Fukunaga et al.
patent: 6028826 (2000-02-01), Yamamoto et al.
patent: 6167010 (2000-12-01), Shimada et al.
patent: 6195319 (2001-02-01), Ohshita et al.
patent: 6285635 (2001-09-01), Watanabe et al.
patent: 6353203 (2002-03-01), Hokodate et al.
patent: 6493304 (2002-12-01), Watanabe et al.
patent: 5-151592 (1993-06-01), None
patent: 05151590 (1993-06-01), None
patent: 2000-331347 (2000-11-01), None
patent: 407270 (2000-10-01), None
Okada Yuu
Watanabe Katsuya
Korzuch Wiliam
Lamb Christopher
Matsushita Electric - Industrial Co., Ltd.
Wenderoth , Lind & Ponack, L.L.P.
LandOfFree
Optical disc apparatus, control device and control signal... 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, control device and control signal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disc apparatus, control device and control signal... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3784726