Recording and reproducing methods of write-once read-many type r

Details Recording and reproducing methods of write-once read-many type r Recording and reproducing methods of write-once read-many type r

1993-08-24

1995-07-25

Epps, Georgia Y.

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 32, 369 58, 235454, G11B 700

Patent

active

054368790

ABSTRACT:
A method of recording data includes irradiating a light spot on an optical card having a recording area including a user data region and an index data region arranged adjacent to each other. User data is recorded on the user data is recorded region and index data on the index data region. User data relates to the user of an optical card and may be stored in accordance with the usage of the card, such as name and age of the user. Index data is necessary for retrieving a desired user data. An optical spot is moved from a track to another track to a plus side in the user data region during the recording, whereas in the index data region, the optical spot is moved from track to track to the minus side.

REFERENCES:
patent: 4868806 (1989-09-01), Sakagami
patent: 4979159 (1990-12-01), Tsuruoka et al.
patent: 4982074 (1991-01-01), Ogasawara
patent: 5204514 (1993-04-01), Horiguchi
patent: 5288982 (1994-02-01), Hosoya

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