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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