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	Optical waveguide type optical pickup
	HORI YOSHIKAZU; SERIZAWA AKIMOTO; MATSUI YASUSHI; UNO TOMOAKI; ODANI JIYUN
	1988-07-07
著作权人	MATSUSHITA ELECTRIC IND CO LTD
专利号	JP1988164034A
国家	日本
文献子类	发明申请
其他题名	Optical waveguide type optical pickup
英文摘要	PURPOSE:To obtain an optical pickup with small size and excellent mass- productivity by fixing an integrated base of such as optical waveguide and grating, moving a small sized condenser lens and forming the grating as concentric or parallel linear form. CONSTITUTION:The light radiated from a semiconductor laser 3 is propagated through a dielectric waveguide path 2 and converted into a collimated beam by a grating lens 4. Moreover, the light is radiated by a grating coupler 5 and radiated onto an optical disk 7 by an external condenser lens 6. The light reflected in the surface of the disk 7 is returned to the lens 6 and made incident on the coupler 5 and propagates the guide path 2 in the direction of light source. The progressing direction of the part of the propagated light is changed by the beam splitter 8 on its way and collected to two pairs of photodetectors 9 by a lens 4 and the signal readout, focusing and tracking are detected. The position of the lens 6 in response to the output of the photodetector is controlled in three dimension and the laser light is accurately collected on the track of the disk 7 at all times.
公开日期	1988-07-07
申请日期	1986-12-26
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/66111]
专题	半导体激光器专利数据库
作者单位	MATSUSHITA ELECTRIC IND CO LTD
推荐引用方式 GB/T 7714	HORI YOSHIKAZU,SERIZAWA AKIMOTO,MATSUI YASUSHI,et al. Optical waveguide type optical pickup. JP1988164034A. 1988-07-07.

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