Semiconductor laser apparatus and optical pickup apparatus

Details Semiconductor laser apparatus and optical pickup apparatus Semiconductor laser apparatus and optical pickup apparatus

2008-05-20

2008-05-20

Harvey, Minsun Oh (Department: 2828)

Coherent light generators

Particular active media

Semiconductor

C372S050120

Reexamination Certificate

active

07376166

ABSTRACT:
A blue-violet emission point, an infrared emission point, and a red emission point in a semiconductor laser apparatus are arranged so as to be arranged in this order on a substantially straight line along a first direction. A blue-violet laser beam emitted from the blue-violet emission point and a red laser beam emitted from the red emission point are incident on an optical disk by an optical system comprising a polarizing beam splitter, a collimator lens, a beam expander, a λ/4 plate, an objective lens, a cylindrical lens, and an optical disk, is returned from the optical disk, and is introduced into an photodetector. The infrared laser beam emitted from the infrared emission point is incident on the optical disk by the optical system, is returned from the optical disk, and is introduced into the photodetector.

REFERENCES:
patent: 5493554 (1996-02-01), Sasaki et al.
patent: 5987043 (1999-11-01), Brown et al.
patent: 6038243 (2000-03-01), Mogi
patent: 6893888 (2005-05-01), Nemoto
patent: 6956322 (2005-10-01), Ikeda
patent: 2001/0050531 (2001-12-01), Ikeda
patent: 2004/0109481 (2004-06-01), Ikeda
patent: 2005/0254391 (2005-11-01), Nagatomi et al.
patent: 2005/0286590 (2005-12-01), Lee
patent: 2006/0083147 (2006-04-01), Nagatomi et al.
patent: 06-131688 (1994-05-01), None
patent: 2001-230502 (2001-08-01), None
patent: 2005-327387 (2005-11-01), None
patent: 2006-13414 (2006-01-01), None
patent: 2006-120189 (2006-05-01), None
“World First CD/DVD/Blue-ray Disc Compatible Three-Wavelength Laser” CX-PAL vol. 62, pp. 8-11.
Hashizu, T., et al., “Three-Wavelength Semiconductor Laser for Optical Disc System” Digest of Technical Papers—25th Annual Meeting of the Laser Society of Japan, Jan. 20-21, 2005, pp. 232-233.

Affiliated with

Also associated with

Rating

Semiconductor laser apparatus and optical pickup apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Semiconductor laser apparatus and optical pickup apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor laser apparatus and optical pickup apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2774923