Optical pickup device and optical disc apparatus
文献类型：专利
| 作者 | YAMAZAKI, KAZUYOSHI |
| 发表日期 | 2013-10-22 |
| 专利号 | US8565059 |
| 著作权人 | HITACHI MEDIA ELECTRONICS CO., LTD. |
| 国家 | 美国 |
| 文献子类 | 授权发明 |
| 其他题名 | Optical pickup device and optical disc apparatus |
| 英文摘要 | An optical pickup device includes a laser diode for emitting a laser beam, an objective lens for collecting the light beam emitted from the laser diode and irradiating an optical disc with the collected light beam, a diffraction element for making the light beam reflected from the optical disc diverge, and a detector having a plurality of detection parts for receiving the diverging light beams caused by the diffraction element. The diffraction element has first, second, and third divided areas, wherein a 0th-order diffracted light from the first divided area, the second divided area, and the third divided area is detected by at least four divided detection parts; and at least two detection parts for detecting the light beam diffracted at the first divided area into first or higher diffraction order are aligned in a direction generally perpendicular to the track of the optical disc. |
| 公开日期 | 2013-10-22 |
| 申请日期 | 2012-06-06 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/68462]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | HITACHI MEDIA ELECTRONICS CO., LTD. |
| 推荐引用方式 GB/T 7714 | YAMAZAKI, KAZUYOSHI. Optical pickup device and optical disc apparatus. US8565059. 2013-10-22. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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