Optical head
文献类型：专利
| 作者 | NAKAMURA SHIGERU; TSUNODA YOSHITO; KAKU TOSHIMITSU; KANEDA NORIYA |
| 发表日期 | 1983-11-02 |
| 专利号 | JP1983188341A |
| 著作权人 | HITACHI SEISAKUSHO KK |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Optical head |
| 英文摘要 | PURPOSE:To obtain a safe information reproducing signal, by providing a reflecting element to feed back a part of light irradiated from a laser to the laser, between the laser and an optical path separating element. CONSTITUTION:The light irradiated from the semiconductor laser 1 is made into a parallel luminous flux by a lens 2 and imaged on a disc 4 by a lens 3 through a semitransparent mirror 8, a part of the light is reflected by the mirror 8 to be laser feedback light 9 and a prescribed luminous amount is fed back to the laser 1 at all times. The reflected light of the disc 4 is all directed to a detection system 7 by a lambda/4 plate 10 and a polarized prism 1 Thus, the prescribed amount of laser feedback light independently of errors in automatic focus control and the information on the disc is attained. |
| 公开日期 | 1983-11-02 |
| 申请日期 | 1982-04-28 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/68658]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | HITACHI SEISAKUSHO KK |
| 推荐引用方式 GB/T 7714 | NAKAMURA SHIGERU,TSUNODA YOSHITO,KAKU TOSHIMITSU,et al. Optical head. JP1983188341A. 1983-11-02. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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