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	Optical pickup
	BUSSHU TERUO; OBE ISAO
	1991-11-14
著作权人	HITACHI LTD
专利号	JP1991256236A
国家	日本
文献子类	发明申请
其他题名	Optical pickup
英文摘要	PURPOSE:To enable miniaturization of this optical pickup by providing an IC substrate equipped with a grating coupler, etc., for emitting laser light, a condenser lens and a variable dioptric lens, etc. CONSTITUTION:The laser light from a semiconductor laser 1 as a light source is progagated through a waveguide 3 of the IC substrate 2 and taken out by a grating splitter 4 and the grating coupler 5 to be emitted light, which is then converged by the variable dioptric lens 7 under a feedback control in refractive index by an objective lens 5 receiving reflecting light, so as to irradiate an optical disk 8. Consequently, the occurrence of aberration of light in the converged beam based on a diffraction conditional change by a beam deflection with the grating coupler is prevented, and the optical pickup is obtained in small size and light weight constitution.
公开日期	1991-11-14
申请日期	1990-03-07
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/74575]
专题	半导体激光器专利数据库
作者单位	HITACHI LTD
推荐引用方式 GB/T 7714	BUSSHU TERUO,OBE ISAO. Optical pickup. JP1991256236A. 1991-11-14.

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