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	Optical head device and optical information device
	SANO, KOUSEI; KOMMA, YOSHIAKI; WAKABAYASHI, KANJI; WADA, HIDENORI; MATSUZAKI, KEIICHI; TANAKA, TOSHIYASU
	2007-08-09
著作权人	MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
专利号	WO2007088809A1
国家	世界知识产权组织
文献子类	发明申请
其他题名	Optical head device and optical information device
英文摘要	An optical head device having a light source for emitting light with different wavelengths, where the device is reduced in size by reducing the size of an optical system. The optical head device has a blue semiconductor laser (203) and an LDPD module (205) for DVD that function as light sources for emitting light having different wavelengths; objective lenses (201, 202) for collecting light from the light sources on an optical information recording medium; a light detector (204) and an LDPD module (205) for DVD that function as a detection section for detecting reflection light from the optical recording medium; and an optical base (120) where the light sources, the objective lenses, and the detection section are placed. The diameter of that ray of the light from the light sources which has a short wavelength is smaller than the diameter of that ray of the light from the light sources which has a long wavelength, where the diameter is a diameter measured at a passage face of the objective lens (201 or 202) to which each ray of the light from the light sources corresponds.
公开日期	2007-08-09
申请日期	2007-01-29
状态	未确认
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/58004]
专题	半导体激光器专利数据库
作者单位	MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
推荐引用方式 GB/T 7714	SANO, KOUSEI,KOMMA, YOSHIAKI,WAKABAYASHI, KANJI,et al. Optical head device and optical information device. WO2007088809A1. 2007-08-09.

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