Optically-readable data medium and reading device for such a med

Details Optically-readable data medium and reading device for such a med Optically-readable data medium and reading device for such a med

1992-05-06

1995-07-11

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 4426, G11B 700

Patent

active

054327733

ABSTRACT:
A mobile optically-readable data medium, arranged in the form of a set of tracks having a sampled type format, each track having pre-engraved zones, known as pre-format zones, and zones reserved for user data, access to said tracks being obtained using pre-engraved marks, known as access marks, representing on each track at least one part of the address of the latter. This medium has no specific radial tracking marks. A reading device for information engraved on the surface of a medium such as that described above; this device performs the radial tracking using information read from the access marks. The invention applies to digital optical disks.

REFERENCES:
patent: Re32937 (1989-05-01), Silvy et al.
patent: 4587648 (1986-05-01), Ando
patent: 4748609 (1988-05-01), Yonezawa et al.
patent: 4967403 (1990-10-01), Ogawa et al.
patent: 5099467 (1992-03-01), Sunihiro et al.
patent: 5182682 (1993-01-01), Weispfenning et al.
"Sectored Servo Headers for Optical Storage Devices", IBM Tech. Disclosure Bulletin, vol. 31, No. 10, Mar. 1989 p. 256.

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