Optical pickup device and lens for optical pickup

Details Optical pickup device and lens for optical pickup Optical pickup device and lens for optical pickup

2009-12-01

2011-12-27

Ortiz Criado, Jorge L (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S112050

Reexamination Certificate

active

08085626

ABSTRACT:
An optical pickup device according to the present invention comprises: a first mirror for reflecting a first light beam outputted from a first light source and letting a second light beam outputted from a second light source pass therethrough; a first object lens for converging the first light beam reflected by the first mirror on an information recording surface of a recording medium; a second mirror for reflecting the second light beam passing through the first mirror; a second object lens for converging the second light beam reflected by the second mirror on the information recording surface of the recording medium; and an achromatic lens for correcting an axial chromatic aberration of the second object lens generated by wavelength variation of the second light beam, wherein the achromatic lens is provided in an optical path between the first mirror and the second mirror.

REFERENCES:
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patent: 2006/0077809 (2006-04-01), Makita et al.
patent: 2006/0098554 (2006-05-01), Ariyoshi et al.
patent: 2008/0095017 (2008-04-01), Kawamura et al.
patent: 2002-092926 (2002-03-01), None
patent: 3297505 (2002-04-01), None
patent: 2005-322281 (2005-11-01), None

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