Optical pickup device and optical disc apparatus
文献类型：专利
| 作者 | YAMAZAKI, KAZUYOSHI; KAWAMURA, TOMOTO |
| 发表日期 | 2013-07-16 |
| 专利号 | US8488425 |
| 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 including: a laser diode for emitting laser light; an objective lens which irradiates an optical beam emitted from the laser diode; an actuator which displaces the objective lens in a radius direction of the optical disc; a grating for branches an optical beam reflected by an information recording layer into plural regions; and one photodetector having plural light receiving parts for receiving the branched optical beams, wherein the photodetector has a first light receiving part which detects zero-th order grating diffracted light and plural second light receiving parts which detecting grating diffracted light having an order not less than that of ±first order grating diffracted light; a detected signal of the zero-th order grating diffracted light is defined as a reproduction signal; and a detected signal of the grating diffracted light is defined as a signal for servo controlling. |
| 公开日期 | 2013-07-16 |
| 申请日期 | 2010-11-29 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/32895]  |
| 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,KAWAMURA, TOMOTO. Optical pickup device and optical disc apparatus. US8488425. 2013-07-16. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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