Optical pickup, optical recording/reproducing device, computer, optical disk recorder, and minute spot forming method
文献类型：专利
| 作者 | SANO, KOUSEI |
| 发表日期 | 2012-08-09 |
| 专利号 | US20120201114A1 |
| 著作权人 | PANASONIC CORPORATION |
| 国家 | 美国 |
| 文献子类 | 发明申请 |
| 其他题名 | Optical pickup, optical recording/reproducing device, computer, optical disk recorder, and minute spot forming method |
| 英文摘要 | An optical pickup, an optical recording/reproducing device, a computer, an optical disk recorder, and a minute spot forming method that can enable light propagation with a high transmittance and can form a minute spot. The optical pickup includes a wavelength plate (202) that converts the polarization state of the light beam emitted from a semiconductor laser (101) and an objective lens optical system (105) that converges the light beam whose polarization state has been converted with a numerical aperture greater than The wavelength plate (202) generates a light beam having a polarization state that differs depending on location. The polarization distribution of the light beam generated by the wavelength plate (202) is axially symmetric with respect to the optical axis of the light beam as an axis of symmetry. A light ray on the light axis is a circularly polarized light. Part of a light ray other than the light ray on the optical axis is an elliptically polarized light with an ellipticity of less than An angle formed by a long axis of an ellipse and a circumferential direction of a circle centered on the light axis in each elliptically polarized light is less than ±45 degrees. |
| 公开日期 | 2012-08-09 |
| 申请日期 | 2010-10-20 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/58584]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | PANASONIC CORPORATION |
| 推荐引用方式 GB/T 7714 | SANO, KOUSEI. Optical pickup, optical recording/reproducing device, computer, optical disk recorder, and minute spot forming method. US20120201114A1. 2012-08-09. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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