Pit spacing in the servo field of an optical disk for speed and

Details Pit spacing in the servo field of an optical disk for speed and Pit spacing in the servo field of an optical disk for speed and

1989-02-28

1994-06-14

Psitos, Aristotelis

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4426, 369 4428, 3692754, G11B 7085

Patent

active

053216750

ABSTRACT:
A sampled servo type optical disc and its driving apparatus is disclosed, in which by cyclically repeating wobbled pits or address pits of the optical disc composed by two significant digits at every N tracks, and preformatting by patterns spaced in different intervals at every track, when the optical disc driving apparatus seeks an object track, the seek direction of the optical head can be detected by the sequence of change of the pattern, and its seek speed can be detected at high speed by the detected result of the pattern, ensuring the speed control of the optical head in response to the detected seek direction and speed.

REFERENCES:
patent: 4779253 (1988-10-01), Getreuer
patent: 4792861 (1988-12-01), Kawase et al.
patent: 4823212 (1989-04-01), Knowles et al.
patent: 4843601 (1989-06-01), Eguchi et al.
patent: 4951275 (1990-08-01), Saitoh et al.
patent: 4967403 (1990-10-01), Ogawa et al.
patent: 5063546 (1991-11-01), Ito et al.
Momen, SPIE vol. 695, "Optical Mass Data Storage 11" (1986), 112-115.
Ronald and Charles, SPIE vol. 529 "Servo and Clock Sampling in the Optimern 1000", Optical Mass data Storage (1985) 140-144.

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