Optical pickup device and optical disc apparatus
文献类型：专利
| 作者 | YAMAZAKI, KAZUYOSHI |
| 发表日期 | 2013-10-01 |
| 专利号 | US8547815 |
| 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 | Optical pickup device including: semiconductor laser diode emitting optical flux; objective lens converging flux emitted from the diode and radiating flux to an optical disc; diffraction grating branching an optical flux reflected from the disc; and a photodetector receiving flux branched by the grating and has a plurality of light receiving parts, wherein: the grating has areas A, B and C; among diffracted beams diffracted by a track of the optical disc, only a 0-th order diffracted beam becomes incident upon area A, and 0-th and ±1-st order diffracted beams become incident upon area B; the photodetector detects a reproduction signal from optical fluxes diffracted in areas A, B and C; the plurality of light receiving parts which detect the +1-st order diffracted beam or the −1-st diffracted beam diffracted in area A are aligned in a direction substantially perpendicular or parallel to a track direction of the disc. |
| 公开日期 | 2013-10-01 |
| 申请日期 | 2012-07-13 |
| 状态 | 授权 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/68468]  |
| 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. US8547815. 2013-10-01. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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