Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2008-03-18
2008-03-18
Korzuch, William (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S044370
Reexamination Certificate
active
10450331
ABSTRACT:
In an apparatus for reading from and/or writing to an optical recording medium, it is desirable, in particular in the case of track jumps, to detect the direction of the track jump, i.e. the direction of movement of an objective lens of the apparatus relative to the optical recording medium in order to be able to carry out corresponding track regulation. For this purpose, and also for determining the number of tracks crossed by the scanning beams, it is proposed to determine the number of zero crossings and also the phase difference between at least two error signals derived from the reflected scanning beams.
REFERENCES:
patent: 4484319 (1984-11-01), Koishi et al.
patent: 5774433 (1998-06-01), Rokutan
patent: 5909416 (1999-06-01), Matsui
patent: 39 32 832 (1989-09-01), None
patent: 0 512 625 (1992-11-01), None
patent: 0 525 896 (1993-02-01), None
patent: 0 536 718 (1993-04-01), None
patent: 0 745 982 (1996-12-01), None
patent: 2000251274 (2000-09-01), None
patent: 02/17310 (2002-02-01), None
“Track-Crossing Detection and Seek-Direction Sensing”, IBM Technical Disclosure Bulletin, IBM Corp., New York, vol. 33, No. 10A, Mar. 1, 1991, pp. 398-403.
Kiel Paul P.
Korzuch William
Lake Joseph J.
Opalach Joseph J.
Ortiz-Criado Jorge L.
LandOfFree
Method for track counting and corresponding apparatus for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for track counting and corresponding apparatus for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for track counting and corresponding apparatus for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3910272