Light projecting device
文献类型：专利
| 作者 | OKADA KAZUO; KONDOU MITSUSHIGE |
| 发表日期 | 1981-12-07 |
| 专利号 | JP1981158319A |
| 著作权人 | MITSUBISHI ELECTRIC CORP |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Light projecting device |
| 英文摘要 | PURPOSE:To simplify the control and at the same time realize a miniaturization with a light weight for a projecting device using a semiconductor laser beam source which is used to an optical information reproducing device, by correcting the beam section form of the semiconductor laser beam source to a circular shape by means of a diffractive element which causes a deflection of light. CONSTITUTION:The beams emitted from a semiconductor laser beam source 1 are turned parallel by a collimator lens 2 and then incident to a diffraction grating 3 for correction. The beams passed through the grating 3 are diffracted and go toward the direction which is deflected by an angle theta from the course (toward dotted lines) of beam in case no grating 3 is provided to be made incident to an objective lens 5 after passing through a beam splitter 4. A laser beam is turned into a light spot having a circular section of a diameter of about 1mum by the lens 5 and then converged so that the focus matches with the surface of a disk 6 having a spiral information track. The reflected light modulated by the information of the disk 6 is condensed by the lens 5, separated from the original optical path by the splitter 4 and enters a photodetector 8 to be turned into an electric signal. |
| 公开日期 | 1981-12-07 |
| 申请日期 | 1980-05-09 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/59261]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | MITSUBISHI ELECTRIC CORP |
| 推荐引用方式 GB/T 7714 | OKADA KAZUO,KONDOU MITSUSHIGE. Light projecting device. JP1981158319A. 1981-12-07. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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