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	Optical device, optical semiconductor device, and optical information processor comprising them
	NAKANISHI, NAOKI; TAKASUKA, SHOICHI; IJIMA, SHINICHI; NAKANISHI, HIDEYUKI
	2003-03-17
著作权人	MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
专利号	SG87514A1
国家	新加坡
文献子类	发明申请
其他题名	Optical device, optical semiconductor device, and optical information processor comprising them
英文摘要	An optical semiconductor device comprising an emitted beam branching section (61) which branches an emitted light beam from a laser device (51), a reflected light beam branching section (71) which branches a reflected light beam from an information recording medium (3) into light beams different from each other in focused state, servo signal sensing photodetectors (43, 45) which receive the branched reflected light beam in a defocused state, a first diffraction grating provided in the emitted light beam branching section for diffracting the reflected light beam having passed through the reflected light beam flux branching section, and a signal sensing photodetector (47) which receives the reflected light beam diffracted by the first diffraction grating.
公开日期	2002-04-16
申请日期	2001-07-04
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/33742]
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	NAKANISHI, NAOKI,TAKASUKA, SHOICHI,IJIMA, SHINICHI,et al. Optical device, optical semiconductor device, and optical information processor comprising them. SG87514A1. 2003-03-17.

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