Optical information processing apparatus

Details Optical information processing apparatus Optical information processing apparatus

1990-04-05

1992-06-02

McElheny, Jr., Donald

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

G11B 700

Patent

active

051193558

ABSTRACT:
An optical information processing apparatus which includes 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 a reproduction signal, tracking error signal and focusing error signal based on the reflected light introduced into the first and second optical waveguides.

REFERENCES:
patent: 4885732 (1989-12-01), Sunagawa et al.

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