Optical information processing apparatus provided with means for

Details Optical information processing apparatus provided with means for Optical information processing apparatus provided with means for

1994-01-06

1994-11-01

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4425, G11B 700

Patent

active

053612469

ABSTRACT:
An apparatus for effecting recording and/or reproduction of information by scanning an optical recording medium with a condensed light beam includes a detecting device for detecting a focusing error signal of the light beam, a focusing servo device for correcting a focusing state of the light beam on the basis of the focusing error signal, and a device for detecting abnormality of the focusing servo.

REFERENCES:
patent: 4410969 (1983-10-01), Maeda
patent: 4669072 (1987-05-01), Miura et al.
patent: 4669074 (1987-05-01), Hsieh et al.
patent: 4982392 (1991-01-01), Soejima
patent: 4982393 (1991-01-01), Matsushita et al.
patent: 4982394 (1991-01-01), Kanda et al.

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