中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Optical pickup unit

文献类型:专利

作者MOGI NAOTO; YAMAMOTO MOTOYUKI; UNNO YOUICHI
发表日期1980-08-21
专利号JP1980108941A
著作权人TOKYO SHIBAURA ELECTRIC CO
国家日本
文献子类发明申请
其他题名Optical pickup unit
英文摘要PURPOSE:To make the optical system of an optical pickup unit simple and small- size to make complicated and precise adjustment needless by using a semiconductor laser having a large-thickness light guide line consisting of muti-layer hetero junction and a narrow-width stripe electrode. CONSTITUTION:The laser light beam radiated from semiconductor laser 1 is condensed by optical system 2 consisting of lenses 2a and 2b and is focused on, for example, video disc 3. The laser light reflected by disc 3 is returned through the light path of optical system 2 and is incident onto semiconductor laser Disc 3 records information, for example, with arrangement of holes, arrangement of convexes and concaves, etc., and information is read by detecting the transmission light or the reflection light of the irradiated laser light. In this case, a little-anisotropy laser light beam can be obtained because semiconductor laser 1 consists of multi- layer hetero junction and the light guide path is 1mu or more thick and the stripe electrode is 5mu or less partially at least, so that the optical system can be simplified to obtain good reproducing.
公开日期1980-08-21
申请日期1979-02-14
状态失效
源URL[http://ir.opt.ac.cn/handle/181661/59249]  
专题半导体激光器专利数据库
作者单位TOKYO SHIBAURA ELECTRIC CO
推荐引用方式
GB/T 7714
MOGI NAOTO,YAMAMOTO MOTOYUKI,UNNO YOUICHI. Optical pickup unit. JP1980108941A. 1980-08-21.

入库方式: OAI收割

来源:西安光学精密机械研究所

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