Optical pickup having optical path length correction function
文献类型：专利
| 作者 | KAWASAKI, RYOICHI; NAKAMURA, SHIGERU; YAMAMOTO, TSUYOSHI |
| 发表日期 | 2008-08-06 |
| 专利号 | EP1936618A3 |
| 著作权人 | SANYO ELECTRIC CO., LTD. |
| 国家 | 欧洲专利局 |
| 文献子类 | 发明申请 |
| 其他题名 | Optical pickup having optical path length correction function |
| 英文摘要 | An optical pickup configured so as to reproduce signals recorded in optical disks of plural standards by means of a single laser beam. The optical pickup has an objective lens (5) for gathering a laser beam emitted from a semiconductor laser (1) - which emits a laser beam of single wavelength - onto a signal recording layer provided in each of optical disks of first (D1) and second (D2) standards whose cover layers differ from each other in terms of a thicknesses. The first standard is; for example, a CD, and the second standard is; for example, a DVD. An optical path length correction member (6) - in which there is formed an optical path length correction section for making a correction to an optical path length falling within a range smaller than the diameter of a light beam passing through the objective lens - is provided in an optical path between the semiconductor laser and the objective lens. The optical path length correction section may also be formed on a lens plane of the objective lens facing the semiconductor laser. |
| 公开日期 | 2008-08-06 |
| 申请日期 | 2007-10-30 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/58164]  |
| 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 | KAWASAKI, RYOICHI,NAKAMURA, SHIGERU,YAMAMOTO, TSUYOSHI. Optical pickup having optical path length correction function. EP1936618A3. 2008-08-06. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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