Coherent light generators – Particular active media – Semiconductor
Reexamination Certificate
2006-03-28
2009-02-03
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular active media
Semiconductor
C372S050122, C372S050210, C372S050100
Reexamination Certificate
active
07486712
ABSTRACT:
A monolithic red/infrared semiconductor laser device is joined to a blue-violet semiconductor laser device. The distance between a blue-violet emission point in the blue-violet semiconductor laser device and an infrared emission point in an infrared semiconductor laser device is significantly shorter than the distance between a red emission point in a red semiconductor laser device and the infrared emission point. A blue-violet laser beam, a red laser beam, and an infrared laser beam respectively emitted from the blue-violet emission point, the red emission point, and the infrared emission point are introduced into a photodetector after being 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 axis correction element.
REFERENCES:
patent: 6136623 (2000-10-01), Hofstetter et al.
patent: 6956322 (2005-10-01), Ikeda
patent: 7079563 (2006-07-01), Miyachi et al.
patent: 2001/0050531 (2001-12-01), Ikeda
patent: 2004/0109481 (2004-06-01), Ikeda
patent: 2006/0140078 (2006-06-01), Nagatomi et al.
patent: 2001-230502 (2001-08-01), None
patent: 2002-164606 (2002-06-01), None
patent: 2002-171022 (2002-06-01), None
patent: 2006-209939 (2006-08-01), None
“Worlds First CD/DVD/Blue-ray Disc Compatible Three-Wavelength Laser” CX-PAL vol. 62 pp. 8-11, Jan. 2005.
Hashizu et al., “Three-wavelength Semiconductor Laser for Optical Disc System”, 25th Annual Meeting of the Laser Society of Japan Digest of Technical Papers pp. 232-233, Jan. 20, 2005.
Bessho Yasuyuki
Hata Masayuki
Nagatomi Kenji
Nomura Yasuhiko
Shono Masayuki
Harvey Minsun
McDermott Will & Emery LLP
Park Kinam
Sanyo Electric Co,. Ltd.
LandOfFree
Semiconductor laser apparatus, method of manufacturing... 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, method of manufacturing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor laser apparatus, method of manufacturing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4090915