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	Beam shaping element, and light source unit and optical pickup using same
	KITAZAWA, TAZUKO; IWAKI, TETSUO
	2003-09-11
著作权人	SHARP KABUSHIKI KAISHA
专利号	US20030169669A1
国家	美国
文献子类	发明申请
其他题名	Beam shaping element, and light source unit and optical pickup using same
英文摘要	A beam shaping element includes a set of diffraction gratings on each surface thereof, in such a manner that intervals between the gratings farer from a vicinity of an optical axis and nearer to a periphery are narrower, wherein each interval between the respective gratings monotonously increases or monotonously decreases along a direction in which each grating-shaped pattern extends. According to the arrangement above, it is possible to correct displacement of a light emitting point of a light source by simply performing a positional adjustment within a plane that is orthogonal to the optical axis. Thus, it is possible to provide the beam shaping element that enables to correct the displacement of the light emitting point of the light source simply by performing positional adjustment in the plane vertical to the optical axis, thereby making it unnecessary to perform positional adjustment along the optical axis direction, and to provide a light source unit and an optical pickup using the beam shaping element.
公开日期	2003-09-11
申请日期	2003-02-25
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/52970]
专题	半导体激光器专利数据库
作者单位	SHARP KABUSHIKI KAISHA
推荐引用方式 GB/T 7714	KITAZAWA, TAZUKO,IWAKI, TETSUO. Beam shaping element, and light source unit and optical pickup using same. US20030169669A1. 2003-09-11.

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