Diffractive optical element and optical pickup
文献类型：专利
| 作者 | SHINODA, MASAHISA; MATSUBARA, DAISUKE; NAKAI, KENYA; NAKAHARA, HIRONORI |
| 发表日期 | 2010-04-22 |
| 专利号 | US20100097917A1 |
| 著作权人 | MITSUBISHI ELECTRIC CORPORATION |
| 国家 | 美国 |
| 文献子类 | 发明申请 |
| 其他题名 | Diffractive optical element and optical pickup |
| 英文摘要 | An optical pickup with a simplified structure in which, according to the type of optical disc, diffracted light from three types of laser light can be directed efficiently onto a photodetector and appropriate focus control can be performed based on the signals detected by the photodetector, and a diffractive optical element that can be used in the optical pickup, which has a semiconductor laser 10 that can emit three types of laser light, a diffractive optical element 42 that diffracts the laser light reflected from the optical disc 31, and a single photodetector 43 that detects the diffracted light exiting the diffractive optical element 42. The diffractive optical element 42 is structured so that 0-order light is the maximal component of the diffracted light generated from each of two of three types of laser light, the two having close wavelengths (with a small wavelength difference), and +1-order light or −1-order light is the maximal component of the diffracted light generated from the remaining one type of laser light. |
| 公开日期 | 2010-04-22 |
| 申请日期 | 2008-02-19 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/58231]  |
| 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,MATSUBARA, DAISUKE,NAKAI, KENYA,et al. Diffractive optical element and optical pickup. US20100097917A1. 2010-04-22. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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