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	SHIMADA JUNICHI; MIHASHI YOSHINOBU; KIKUCHI KEISUKE; SAKURAI KENJIRO
	1986-03-14
著作权人	KOGYO GIJUTSUIN
专利号	JP1986008497B2
国家	日本
文献子类	授权发明
其他题名	-
英文摘要	An optical memory playback apparatus is constructed so that a single longitudinal mode of laser beam emitted from a self-coupling semiconductor laser element is projected through an optical system onto an information recording medium and the laser beam reflected by the information recording medium is returned through the same optical system back to the semiconductor laser element. In addition, the apparatus interposes a spatially uneven phase plate in the optical system, whereby the longitudinal mode of emission of the semiconductor laser element is converted into a random multi-mode at all times and, consequently, the reproduction of information from the information recording medium is effected by detecting the variation in the intensity of output or terminal voltage of the semiconductor laser element which occurs in conformity with the variation in the intensity of the reflected laser beam.
公开日期	1986-03-14
申请日期	1981-02-12
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/70432]
专题	半导体激光器专利数据库
作者单位	KOGYO GIJUTSUIN
推荐引用方式 GB/T 7714	SHIMADA JUNICHI,MIHASHI YOSHINOBU,KIKUCHI KEISUKE,et al. -. JP1986008497B2. 1986-03-14.

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