Light receiving and emitting compound element and optical pick-up device using the same
文献类型：专利
| 作者 | TANAKA, HARUO; TSUMORI, MASAHIKO |
| 发表日期 | 2001-07-12 |
| 专利号 | US20010007543A1 |
| 著作权人 | ROHM CO., LTD. |
| 国家 | 美国 |
| 文献子类 | 发明申请 |
| 其他题名 | Light receiving and emitting compound element and optical pick-up device using the same |
| 英文摘要 | A light emitting portion (1) and an objective lens (3) for collecting a light of the light emitting portion are provided. The light receiving portion (2) is provided in the vicinity of the light emitting portion (1) such that the light can be collected by the objective lens and the light reflected by an optical disk (10) to be an object can be detected. The light emitting portion and the light receiving portion are formed to get in a range of 22 lambd/NA (beam waist BW) wherein a numerical aperture of the objective lens is represented by NA and a wavelength of the light emitting portion is represented by lambd or the light receiving portion is multi-split such that a focal shift of a beam having an astigmatism formed thereon can be detected. As a result, it is possible to obtain a light receiving and emitting compound element capable of surely detecting a focal position without adjusting a positional relationship between the light emitting portion and the light receiving portion and an optical pick-up device capable of being easily assembled and of detecting and correcting a shift in a focus or a tracking with a high sensitivity. |
| 公开日期 | 2001-07-12 |
| 申请日期 | 2001-01-05 |
| 状态 | 授权 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/60570]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | ROHM CO., LTD. |
| 推荐引用方式 GB/T 7714 | TANAKA, HARUO,TSUMORI, MASAHIKO. Light receiving and emitting compound element and optical pick-up device using the same. US20010007543A1. 2001-07-12. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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