Optical pickup and optical disc drive
文献类型：专利
| 作者 | SHINODA, MASAHISA |
| 发表日期 | 2011-12-13 |
| 专利号 | US8077581 |
| 著作权人 | MITSUBISHI ELECTRIC CORPORATION |
| 国家 | 美国 |
| 文献子类 | 授权发明 |
| 其他题名 | Optical pickup and optical disc drive |
| 英文摘要 | An optical pickup has a semiconductor laser device that can emit laser beams with different wavelengths. A beam splitter and objective lens direct the emitted beam onto a rotating optical disc. Reflected light returns through the objective lens and beam splitter to a photodetector. A pair of liquid crystal elements on the optical path from the optical disc to the photodetector have controllable lens functions acting in different directions to produce an adjustable astigmatic effect that enables the photodetector to generate a focus error signal with a linear range appropriate for the type of optical disc, the number of signal layers in the optical disc, and the spacing between the layers. |
| 公开日期 | 2011-12-13 |
| 申请日期 | 2009-02-06 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/32767]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | MITSUBISHI ELECTRIC CORPORATION |
| 推荐引用方式 GB/T 7714 | SHINODA, MASAHISA. Optical pickup and optical disc drive. US8077581. 2011-12-13. |
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。