Apparatus for recording/reproducing optical information on/from

Details Apparatus for recording/reproducing optical information on/from Apparatus for recording/reproducing optical information on/from

1991-05-29

1994-08-23

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4427, 369 58, 235454, G11B 700

Patent

active

053413547

ABSTRACT:
An apparatus for recording/reproducing information on/from an optical card, in which a card identifying information data, which is recorded on the outside of a normal data recording portion of an optical card, can be reproduced by an optical head, a demodulating circuit and a focusing/tracking circuit, which are originally provided for recording/reproducing information on/from the normal data recording portion of the optical card. Therefore, in the apparatus according to the invention, it is unnecessary to specially provide the other apparatus for reproducing the card identifying information data, so that the apparatus as a whole can be made small and the cost therefor can be decreased.

REFERENCES:
patent: 4538059 (1985-08-01), Rudland
patent: 4641017 (1987-02-01), Lopata
patent: 4683371 (1987-07-01), Drexler
patent: 4979159 (1990-12-01), Tsuruoka et al.
patent: 5010534 (1991-04-01), Enari et al.

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