Objective lens, optical pick-up device, and optical disk device

Details Objective lens, optical pick-up device, and optical disk device Objective lens, optical pick-up device, and optical disk device

2007-11-27

2007-11-27

Edun, Muhammad (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044230, C369S044320, C369S112230, C369S112010

Reexamination Certificate

active

10885415

ABSTRACT:
To provide an optical pickup device and optical disk device capable of realizing at least one of thickness reduction, size reduction and suppression against characteristic deterioration even where coping with various wavelengths of laser including a blue laser. An optical pickup device comprising light sources for respectively emitting a plurality of different wavelengths of light, unit structured for causing at least a part of the light emitted from the light sources to pass a same optical path; and focusing unit for focusing the light. The focusing unit includes at least first and second focusing parts, the first focusing part being to focus mainly a wavelength of light different from a wavelength of light to be mainly focused by the second focusing part.

REFERENCES:
patent: 5629514 (1997-05-01), Lee et al.
patent: 6009066 (1999-12-01), Yoo et al.
patent: 6081498 (2000-06-01), Yoo et al.
patent: 6256283 (2001-07-01), Fukakusa et al.
patent: 6266314 (2001-07-01), Fukakusa et al.
patent: 6339511 (2002-01-01), Tanaka
patent: 6556533 (2003-04-01), Fukakusa et al.
patent: 6928043 (2005-08-01), De Vries et al.
patent: 2002/0067553 (2002-06-01), Maeda et al.
patent: 2002/0110076 (2002-08-01), Yanagisawa
patent: 2002/0181366 (2002-12-01), Katayama
patent: 2003/0095347 (2003-05-01), Kobayashi
patent: 2004/0109401 (2004-06-01), Ogasawara
patent: 1202259 (2002-05-01), None
patent: 1341166 (2003-09-01), None
patent: 1365270 (2003-11-01), None
patent: 10334494 (1998-12-01), None
patent: 11224436 (1999-08-01), None
patent: 2000123394 (2000-04-01), None
patent: 200123202 (2001-01-01), None
patent: 2002245660 (2002-08-01), None
patent: 2004103135 (2004-04-01), None
patent: 02061488 (2002-08-01), None
Takeshi Shimano, et al., “Measuring Spherical Aberration for the Dynamic Compensation of Substrate-Thickness Errors,” Proceedings of the Spie—The International Society for Optical Engineering Spie-Int. Soc. Opt. Eng USA, vol. 4342, XP002317227, pp. 457-464, Jan. 2002.
Ryuichi Katayama, et al., “Blu NAO.85/DVD/CD Compatible Optical Head,” 2002 International Symposium on Optical Memory and Optical Data Storage Topical Meeting, Functional Devices Research Laboratories, NEC Corporation, R&D Technical Support Center, XP010600162, pp. 168-170, 2002.
Shigeharu Kimura, et al., “A Module of a Blue-Violet Laser Diode and Photodiodes for Adaptive Compensation of Spherical-Aberration,”2002 International Symposium on Optical Memory and Optical Data Storage Topical Meeting, Hitachi Ltd., Central Research Laboratory, XP010600261, pp. 25-27, 2002.
Holger Hofmann, et al., “Blue Laser Phase Change Recording System,” Journal of Magnetism and Magnetic Materials, Elsevier, Amsterdam, NL, Thomson Multimedia Corporate Research, Optical Recording, Deutsche Thomson-Brandt GmbH, vol. 249, No. 3, XP004389871, pp. 499-503, Sep. 2002.

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