Optical head device having deflection means including means for

Details Optical head device having deflection means including means for Optical head device having deflection means including means for

1987-10-02

1989-04-18

Richardson, Robert L.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 44, 369119, G11B 700

Patent

active

048233358

ABSTRACT:
An optical head device comprises a semiconductor laser beam source, a diffraction grating for deflecting a laser beam emitted from the laser beam source at an angle of about 90.degree., a beam splitter placed between the laser beam source and the diffraction grating, and an objective for converging the laser beam deflected by the diffraction grating on an optical disc.

REFERENCES:
patent: 4733065 (1988-03-01), Hoshi et al.
patent: 4734905 (1988-03-01), Kuwayama et al.

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