Method and apparatus for optical head and optical...

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium

Reexamination Certificate

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C369S112010, C369S044370

Reexamination Certificate

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06967919

ABSTRACT:
An optical head for reproducing information contained on an optical information disk includes a plurality of light sources and a plurality of light receiving elements in correspondence with the plurality of laser light sources. There is constructed a constitution in which one laser light source in the plurality of laser light sources is constituted by an individual laser diode and which includes a laser module constituted by other laser light sources and the plurality of light receiving elements to thereby enable to realize the small size of the optical head.

REFERENCES:
patent: 5696749 (1997-12-01), Brazas et al.
patent: 5875167 (1999-02-01), Katayama
patent: 09-274730 (1997-10-01), None
patent: 11-306581 (1999-11-01), None

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