Optical information processing apparatus

Details Optical information processing apparatus Optical information processing apparatus

1988-09-02

1990-07-31

McElheny, Jr., Donald

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4441, G11B 700

Patent

active

049455257

ABSTRACT:
An optical information processing apparatus including a substrate of a transparent material, first and second optical waveguides formed on opposite faces of said transparent substrate, a light introducing device for introducing reflected light from an information writing medium into the first and second optical waveguides, and a detecting device for detecting reproduction signal, tracking error signal and focusing error signal based on the reflected light introduced into the first and second optical waveguides.

REFERENCES:
patent: 4718052 (1988-01-01), Kondo et al.
patent: 4779259 (1988-10-01), Kono et al.
patent: 4833561 (1989-05-01), Sunagawa et al.
Society of Applied Physics, Fall in 1985, by Ura et al.

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