Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1983-10-05
1987-05-26
Faber, Alan
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 54, 369116, 346 76L, G11B 7095
Patent
active
046690727
ABSTRACT:
A control apparatus for controlling an optical video disk player capable of optical recording and reproduction of video and/or audio information on a recording medium by a light beam. The control apparatus comprises a tracking failure detection circuit detecting failure of the light beam to accurately track along a track formed on the recording medium, and a light beam control signal generator circuit reducing the energy of the light beam in response to the detection of the tracking failure by the tracking failure detection circuit, whereby recording of information on the recording medium is inhibited in the event of occurrence of a tracking error.
REFERENCES:
patent: 4283785 (1981-08-01), Miyouchi
patent: 4507767 (1985-03-01), Takasugi
patent: 4516235 (1985-05-01), Tarzaishi
patent: 4554652 (1985-11-01), Maeda
Partial English Translation of Japanese Pat. No. 55-113137, published 9/1/80.
Fujishima Tooru
Kawashima Tooru
Kudo Yoshimichi
Miura Yoshio
Oku Masuo
Faber Alan
Hitachi , Ltd.
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