Optical pickup device
文献类型：专利
| 作者 | TSUYOSHI TOSHIAKI; YONEZAWA SEIJI |
| 发表日期 | 1984-01-21 |
| 专利号 | JP1984011548A |
| 著作权人 | HITACHI SEISAKUSHO KK |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Optical pickup device |
| 英文摘要 | PURPOSE:To obtain a signal with high SN ratio, by inputting a laser light irradiated from one or both spots of a semiconductor laser being a light source to other spot different from the irradiated laser light spot, for decreasing the coherence of the semiconductor laser, and suppressing the optical noise of the semiconductor laser. CONSTITUTION:A laser light irradiated from a spot 8a of the semiconductor laser 1 is divided into a luminous flux going to a disc reflecting plane 6 and that going to a reflecting mirror 13c. The light going to the disc forms an optical spot 9 on a disc 6, the reflecting light passes through again a 1/4 wavelength plate and is directed in the direction of a main optical detector 7 with the direction of polarization of light changed by 90 deg. from the beginning, and the information of the disc is converted into an electric signal. On the other hand, the luminous flux reflected in the direction of the reflecting mirror 13c is focused with a lens 2b and given to the other irradiating spot 8b of the semiconductor laser. Further, the laser light irradiated from the spot 8b is separated into the luminous flux in the direction of a lens 2a and of a monitor optical detector 12 at a semi-transmitting mirror 11a, and the laser light irradiated in the lens 2a is stopped and given to the spot 8a. |
| 公开日期 | 1984-01-21 |
| 申请日期 | 1982-07-12 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/68664]  |
| 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 | TSUYOSHI TOSHIAKI,YONEZAWA SEIJI. Optical pickup device. JP1984011548A. 1984-01-21. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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