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	Optical information reproducing apparatus
	OKADA, KAZUO C/O MITSUBISHI DENKI K.K.; SHIKAMA, SHINSUKE C/O MITSUBISHI DENKI K.K.; EGASHIRA, NOBUMASA C/O MITSUBISHI DENKI K.K.; HASHIMOTO, AKIRA C/O MITSUBISHI DENKI K.K.
	1984-05-23
著作权人	MITSUBISHI DENKI KABUSHIKI KAISHA
专利号	EP0109194A1
国家	欧洲专利局
文献子类	发明申请
其他题名	Optical information reproducing apparatus
英文摘要	An optical information reproducing apparatus for optically reproducing a signal recorded on a disc which comprises a light source (1) of a semiconductor laser having a single longitudinal mode characteristic, a recording disc (8) having an information track of an optically readable structure, a collimating lens (2) for condensing a linearly polarized light beam from the light source to apply the same to the recording disc, an objective lens (7) for condensing the reflected light beam, a polarization beam splitter (4) for separating the reflected light beam, a light detector (11) for detecting the separated light beam, and a feed back means such as a phase plate (5) involving a wavelength deviation by a predetermined amount from the 1/4 wavelength, or a 1/4 wavelength phase plate disposed to be inclined by more than a predetermined angle about the light axis of the light source, or the like, for feeding back a portion of the reflected light beam exceeding a predetermined amount to the light source.
公开日期	1984-05-23
申请日期	1983-10-14
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/59336]
专题	半导体激光器专利数据库
作者单位	MITSUBISHI DENKI KABUSHIKI KAISHA
推荐引用方式 GB/T 7714	OKADA, KAZUO C/O MITSUBISHI DENKI K.K.,SHIKAMA, SHINSUKE C/O MITSUBISHI DENKI K.K.,EGASHIRA, NOBUMASA C/O MITSUBISHI DENKI K.K.,et al. Optical information reproducing apparatus. EP0109194A1. 1984-05-23.

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