Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Patent
1986-12-17
1990-03-06
Psitos, Aristotelis M.
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
369 32, 369 46, 369 44, 360 7704, 360 7808, G11B 2722
Patent
active
049072145
ABSTRACT:
An optical disc apparatus includes a tracking device which positions the beam light on the recording track of an optical disc in order to carry out at least recording or reproducing of information by moving the beam light in the radial direction of the optical disc, and a detection device for obtaining a position deviation signal of the beam light by receiving reflected light from the surface of the optical disc. In addition, the apparatus includes an optical head which carries out recording or reproducing of information for the recording track of the optical disc, a control device which controls the tracking device in response to the position deviation signal obtained from the detection device, a first device which reads, prior to an actual operation of recording or reproducing, a position deviation signal from the detection device, and stores the resulting data in a memory as eccentricity correction data for the recording track, and a second device which transfers, when actually carrying out recording or reproducing operation, the eccentricity correction data memorized in the memory to the D/A converter and gives the output of the D/A converter to the tracking control device. The D/A converter converts the digital quantity read from the memory to an analog signal, and the analog signal may be applied to a device for driving the optical head.
REFERENCES:
patent: 4321700 (1982-03-01), Russell
patent: 4527263 (1985-07-01), Nakagawa
patent: 4594622 (1986-06-01), Wallis
patent: 4695989 (1987-09-01), Kimoto
patent: 4755977 (1988-07-01), Aked
Nagano Katsumi
Watanabe Hiroshi
Kabushiki Kaisha Toshiba
Psitos Aristotelis M.
LandOfFree
Eccentricity correction apparatus for an optical disk device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Eccentricity correction apparatus for an optical disk device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Eccentricity correction apparatus for an optical disk device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-53765