| 发明名称 | Objective lens and optical pickup device | ||
| 摘要 | An objective lens capable of converging light of a used wavelength with a satisfactory aberration on a recording medium is provided. An objective lens for converging light of a predetermined wavelength λ on a recording medium satisfies the following condition: |CML|+|CMF|<0.03 λ, where CML is an amount of a generated third-order coma aberration per 1 degree of tilt of the objective lens, and CMF is an amount of a generated third-order coma aberration per 1 degree of tilt of off-axis light. | ||
| 申请公布号 | US9190098(B2) | 申请公布日期 | 2015.11.17 |
| 申请号 | US201414555509 | 申请日期 | 2014.11.26 |
| 申请人 | Panasonic Intellectual Property Management Co., Ltd. | 发明人 | Minami Kazuhiro;Tanaka Yasuhiro |
| 分类号 | G06F17/50;G02B13/18;G11B7/00;G11B7/1374;G11B7/095;G11B7/1392;G02B27/00;G02B13/00;G02B3/04;G02B5/18;G11B7/24009 | 主分类号 | G06F17/50 |
| 代理机构 | McDermott Will & Emery LLP | 代理人 | McDermott Will & Emery LLP |
| 主权项 | 1. An objective lens for converging light of a predetermined wavelength λ on a recording medium, the objective lens satisfying the following condition: |CMD|<0.02 λ 0.02 λ<|CML|<0.2 λ where CML is an amount of a generated third-order coma aberration per 1 degree of tilt of the objective lens, and CMD is an amount of a generated third-order coma aberration per 1 degree of tilt of the recording medium. | ||
| 地址 | Osaka JP | ||