Optical recording medium and tracking servo circuit adapted ther

Details Optical recording medium and tracking servo circuit adapted ther Optical recording medium and tracking servo circuit adapted ther

1994-04-28

1995-04-04

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4434, 3692753, 3692754, G11B 700

Patent

active

054043450

ABSTRACT:
In an optical recording medium of the present invention, a plurality of tracks each extending in a first direction are arranged in a second direction which is different from the first direction in such a manner that the plurality of tracks are apart from one another along the second direction with a track-track between area being formed between each two tracks adjacent to each other. In the optical recording medium, at least one wobbling pit is formed in a track-track between area positioned between each two tracks. The wobbling pit is adapted for tracking operations for both the each two adjacent tracks. In order to discriminate between one track and the other track of the each two adjacent tracks, the optical recording medium is provided with a disrcimination pit, or the wobbling pits are arranged so that the number, position or dimension of the wobbling pit provided on a track-track between area may be changed.

REFERENCES:
patent: 4020278 (1977-04-01), Carre et al.
patent: 4288510 (1981-09-01), Tinet et al.
patent: 4385303 (1983-05-01), Akahira et al.
patent: 4779253 (1988-10-01), Getreuer et al.
patent: 5034940 (1991-06-01), Saito et al.
patent: 5063546 (1991-11-01), Ito et al.
patent: 5095478 (1992-03-01), Taki et al.

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