Information recording-reproducing apparatus

Details Information recording-reproducing apparatus Information recording-reproducing apparatus

1984-03-07

1987-05-19

Faber, Alan

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 45, 369 46, 369170, 250201, 250202, G11B 7095

Patent

active

046673164

ABSTRACT:
An information recording-reproducing apparatus provided with a first light beam for recording information on a recording medium and a monitoring second light beam for reproducing the recorded information simultaneously with the recording is characterized in that when only the reproduction of already recorded information is effected, a focus control signal or a tracking control signal is obtained by the use of the first light beam.

REFERENCES:
patent: 3969575 (1976-07-01), Gerritsen
patent: 3983317 (1976-09-01), Glorioso
patent: 4085423 (1978-04-01), Tsunoda
patent: 4298974 (1981-11-01), Tsunoda
patent: 4334300 (1982-06-01), Arquie

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