Optical pickup apparatus

Details Optical pickup apparatus Optical pickup apparatus

2011-04-19

2011-04-19

Chow, Van N (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044150, C369S044160

Reexamination Certificate

active

07929385

ABSTRACT:
An optical pickup apparatus for recording and/or reproducing information onto/or from information recording surface, the optical pickup apparatus comprises a laser light source, an objective lens for converging light beams from the laser light source onto the information recording surface through a protective layer of an optical information recording medium, an optical device for changing a divergence angle of incident light beams by moving in an optical axis direction, the optical device being arranged between the laser light source and the objective lens, a light receiving device for receiving light beams reflected by the information recording surface and passed through the objective lens, and a driving device capable of moving the optical device in a direction crossing the optical axis.

REFERENCES:
patent: 5774443 (1998-06-01), Shibano
patent: 6728179 (2004-04-01), Nakano et al.
patent: 7372785 (2008-05-01), Lee et al.
patent: 2001-28147 (2001-01-01), None
patent: 2003-45068 (2003-02-01), None

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