Optical pickup device
文献类型：专利
| 作者 | SUENAGA HIDEO; SUGIYAMA TOSHIO; YAMAMOTO SETSUO |
| 发表日期 | 1983-10-14 |
| 专利号 | JP1983175147A |
| 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 detect a high-quality signal from a disc and to reduce the loss of the quantity of light of the luminous flux used for signal read to improve the efficiency of light use, by feeding back a part of the light of a semiconductor laser to reduce the noise accompanied with the change of the longitudinal mode of the laser. CONSTITUTION:Since the noise level is lowered by feedback of a certain quantity or more in the relation between the level of the feedback noise of the semiconductor laser and the feedback quantity, an optical feedback material 16 consisting of a spherical concave mirror having a hollowed part 12 through which a luminous flux 11 (part THETA) used for reading out a signal from the disc passes is arranged between the semiconductor laser 1 and a coupling lens 2, and a luminous flux 13 which is not incident to the coupling lens 2 is reflected by a reflective face 14 and is fed back to the semiconductor laser |
| 公开日期 | 1983-10-14 |
| 申请日期 | 1982-04-05 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/70479]  |
| 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 | SUENAGA HIDEO,SUGIYAMA TOSHIO,YAMAMOTO SETSUO. Optical pickup device. JP1983175147A. 1983-10-14. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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