Optical disk recording and reproducing apparatus

Details Optical disk recording and reproducing apparatus Optical disk recording and reproducing apparatus

1990-07-11

1994-04-05

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4429, 369 4432, 369 4425, 369 4435, 360 7806, G11B 700

Patent

active

053011740

ABSTRACT:
An optical disk recording and reproducing apparatus in which during coarse access, an adjustable target speed is obtained using a speed offset value stored in a speed offset memory. The speed offset value being determined between a plurality of reference velocities and a plurality of adjustable offset velocity values. The system also performs fine access within a defined distance from the optical head to the designated track upon completion of the coarse access mode. The speed offset values are continually updated by to improve the accuracy of the coarse access operation saving overall access time.

REFERENCES:
patent: 4591933 (1986-05-01), Quackenbush
patent: 4622604 (1986-11-01), Hashimoto et al.
patent: 4837757 (1989-06-01), Okada et al.
patent: 4907109 (1990-03-01), Senio
patent: 5038333 (1991-08-01), Chow et al.
patent: 5056072 (1991-10-01), Wachi
patent: 5063549 (1991-11-01), Yamamuro
IBM Technical Disclosure Bulletin, vol. 28, No. 7, Dec. 1985 pp. 3123--3127.

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