Optical Pickup Apparatus
文献类型：专利
| 作者 | HOTTA, TOHRU; KAWASAKI, RYOICHI |
| 发表日期 | 2011-09-29 |
| 专利号 | US20110235494A1 |
| 著作权人 | SANYO ELECTRIC CO., LTD. |
| 国家 | 美国 |
| 文献子类 | 发明申请 |
| 其他题名 | Optical Pickup Apparatus |
| 英文摘要 | An optical pickup apparatus includes: a laser diode configured to generate a laser beam; and an objective lens having an annular diffraction zone formed on an incident surface thereof on which the laser beam is incident, the annular diffraction zone being a zone configured to focus the laser beam on each of signal recording layers of first to third optical discs so that a signal recorded in each of the signal recording layers of the first to third optical discs are read, the first optical disc having the signal recording layer at a first distance from a surface thereof, the second optical disc having the signal recording layer at a second distance longer than the first distance from a surface thereof, the third optical disc having the signal recording layer at a third distance longer than the first distance and shorter than the second distance from a surface thereof. |
| 公开日期 | 2011-09-29 |
| 申请日期 | 2010-09-24 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/58577]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | SANYO ELECTRIC CO., LTD. |
| 推荐引用方式 GB/T 7714 | HOTTA, TOHRU,KAWASAKI, RYOICHI. Optical Pickup Apparatus. US20110235494A1. 2011-09-29. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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