Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1987-01-07
1989-09-12
Salce, Patrick R.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 46, 369 59, 369275, G11B 1722
Patent
active
048666866
ABSTRACT:
The recording surface of an optical record carrier (1) is divided into a succession of first (A) and second (B) annular zones, each including a plurality of substantially concentric information tracks. The tracks in each zone (A) include radially aligned first control words (13) and the tracks in the annular zones (B) include radially aligned second control words (14), the structures of the first and second control words being distinguishable from each other. An optical scanning device projects a beam which as it scans the tracks reads the control words and a detection circuit generates a measurement signal V.sub.m upon each passage of the beam from one zone to another. The measurement signal can be utilized to rapidly address the scanning beam to any of the annular zones.
REFERENCES:
patent: 4535439 (1985-08-01), Satoh et al.
patent: 4564929 (1986-01-01), Yonezawa et al.
patent: 4587648 (1986-05-01), Ando
patent: 4669077 (1987-05-01), Gerard et al.
patent: 4751695 (1988-06-01), Kaku et al.
Ault Anita M.
Eason Leroy
Optical Storage International-Holland
Salce Patrick R.
Tamoshunas Algy
LandOfFree
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