Pickup device for optical disk

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	Pickup device for optical disk
其他题名	Pickup device for optical disk
	ANDO SHINJI; HATTORI AKIRA
	1988-05-31
专利权人	MITSUBISHI ELECTRIC CORP
公开日期	1988-05-31
授权国家	日本
专利类型	发明申请
摘要	PURPOSE:To eliminate the need of diffraction grating and to simplify an assemble work and also to reduce the size of a device by composing a chip of semiconductor laser with a plural number of light emitting elements and their connecting resistors having different resistance values. CONSTITUTION:The chip 21 of the semiconductor laser 1 is composed of three sets of the light emitting element 22-24 and the resistors 25-27 having respective different resistance values, and the interval between light emitting points of each of the elements is set up to 10-300mu by emitting a laser beam 22a for pit detection and laser beams 23a and 24a for tracking guide. The laser beams are reflected at an optical disk 10 via a beam splitter 11 and formed an image at a detector 13 to reproduce a bit of recording information. Each of the elements is independently emitted so that no diffraction grading is necessary, thus the assemble work is simplified and according the size of the device is reduced.
其他摘要	目的：通过组成具有多个发光元件的半导体激光器芯片及其具有不同电阻值的连接电阻器，消除对衍射光栅的需要并简化组装工作并减小器件的尺寸。组成：半导体激光器1的芯片21由三组具有各自不同电阻值的发光元件22-24和电阻器25-27组成，并且每个元件的发光点之间的间隔设置为通过发射用于凹坑检测的激光束22a和用于跟踪引导的激光束23a和24a来到10-300μ。激光束通过分束器11在光盘10处反射，并在检测器13处形成图像，以再现一些记录信息。每个元件独立地发射，因此不需要衍射分级，因此简化了组装工作并且减小了装置的尺寸。
主权项	-
申请日期	1986-11-14
专利号	JP1988127441A
专利状态	失效
申请号	JP1986272169
公开（公告）号	JP1988127441A
IPC 分类号	G11B7/125 \| H01S5/00 \| H01S3/18
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/59484
专题	半导体激光器专利数据库
作者单位	MITSUBISHI ELECTRIC CORP
推荐引用方式 GB/T 7714	ANDO SHINJI,HATTORI AKIRA. Pickup device for optical disk. JP1988127441A[P]. 1988-05-31.

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