Optical recording medium for land-and-groove recording system

Details Optical recording medium for land-and-groove recording system Optical recording medium for land-and-groove recording system

1997-02-24

1999-11-02

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4434, 3692753, 3692754, G11B 7095

Patent

active

059783273

ABSTRACT:
An optical recording medium in which information can be recorded in tracks formed by both lands and grooves provided between lands, and rows of prepits corresponding to preformat information in both adjacent lands and grooves are formed by deviating in the circumferential direction. Counting grooves for counting tracks are formed at both sides of the row of prepits for the land, the prepit for the groove has a depth or width different from that of the groove, the counting groove has a depth or width different from that of the groove, and the prepit for the land is formed narrower and/or shallower than the counting groove.

REFERENCES:
patent: 4707816 (1987-11-01), Yonezawa et al.
patent: 5383176 (1995-01-01), Inui et al.
patent: 5493552 (1996-02-01), Kobori
patent: 5774439 (1998-06-01), Aoki et al.

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