Optical pickup device
文献类型：专利
| 作者 | YAMANAKA YUTAKA; RANGU HIROYOSHI |
| 发表日期 | 1985-08-14 |
| 专利号 | JP1985154337A |
| 著作权人 | NIPPON DENKI 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 improve the noise characteristic by irradiating a radiated light from a semiconductor laser light source selected to a single wavelength and oscillated in the single axial mode to a recording medium, detecting the reflected light and feeding back a prescribed luminous amount of light to the light source. CONSTITUTION:As a semiconductor laser 1, a distribution feedback laser provided with a periodic structure 12 having a period being one over an integral number of the oscillated wavelength close to a laser active layer 11 is used and the laser is oscillated in the single axis mode even under the presence of return light. The irradiated light of the laser 1 is formed into a collimate light by the lens 2 and collected to the recording medium 6 as a spot through a polarized light beam splitter 3 and a 1/4 wavelength plate 4. The reflected light from the medium 6 is reflected by the splitter 3 through a lens 5 and a wavelength plate 4 and made incident to a detector 7. The return light amount to the laser 1 is set to 0.5% by the angle adjustment of the wavelength plate 4. Thus, the optical pickup device excellent in noise characteristic is obtained. |
| 公开日期 | 1985-08-14 |
| 申请日期 | 1984-01-24 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/68700]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | NIPPON DENKI KK |
| 推荐引用方式 GB/T 7714 | YAMANAKA YUTAKA,RANGU HIROYOSHI. Optical pickup device. JP1985154337A. 1985-08-14. |
入库方式： OAI收割
来源：西安光学精密机械研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。