Optical head device, and optical information recording/reproducing device and optical information recording/reproducing method using the same
文献类型：专利
| 作者 | KATAYAMA, RYUICHI |
| 发表日期 | 2010-04-08 |
| 专利号 | US20100085860A1 |
| 著作权人 | NEC CORPORATION |
| 国家 | 美国 |
| 文献子类 | 发明申请 |
| 其他题名 | Optical head device, and optical information recording/reproducing device and optical information recording/reproducing method using the same |
| 英文摘要 | Light outputted from a semiconductor laser (1) passes through a liquid crystal diffraction optical element (2a) as 0-order light and is collected to a disc (5). Reflection light from the disc (5) is diffracted by the liquid crystal diffraction optical element (2a) as ±primary diffracted light and received by optical detectors (6a, 6b). When information is being recorded on the disc (5), light entered the liquid crystal diffraction optical element (2a) from the side of the semiconductor laser (1) is outputted to the side of an objective lens (4) from the liquid crystal diffraction optical element (2a) at a high efficiency. When information is being reproduced from the disc (5), the liquid crystal diffraction optical element (2a) is driven so that light entered the liquid crystal diffraction optical element (2a) from the side of the objective lens (4) is outputted to the side of the optical detectors (6a, 6b) from the liquid crystal diffraction optical element (2a) at a high efficiency without depending on the polarization state. |
| 公开日期 | 2010-04-08 |
| 申请日期 | 2008-03-04 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/58241]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | NEC CORPORATION |
| 推荐引用方式 GB/T 7714 | KATAYAMA, RYUICHI. Optical head device, and optical information recording/reproducing device and optical information recording/reproducing method using the same. US20100085860A1. 2010-04-08. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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