| 发明名称 | Imaging lens and imaging apparatus | ||
| 摘要 | An imaging lens consists essentially of six lenses in the following order from the object side: a negative first lens; a positive second lens; a negative third lens; a positive fourth lens; a positive fifth lens; and a negative sixth lens. An aperture stop is disposed more toward the object side than the image-side surface of the fourth lens. Conditional expression (4) is satisfied, where f is the focal length of the entire system, and f56 is the combined focal length of the fifth lens and the sixth lens: f56/f<−6.4 (4). | ||
| 申请公布号 | US9383555(B2) | 申请公布日期 | 2016.07.05 |
| 申请号 | US201514603386 | 申请日期 | 2015.01.23 |
| 申请人 | FUJIFILM Corporation | 发明人 | Asami Taro |
| 分类号 | G02B9/60;G02B13/04;G02B9/62;G02B13/00;G02B13/18 | 主分类号 | G02B9/60 |
| 代理机构 | Young & Thompson | 代理人 | Young & Thompson |
| 主权项 | 1. An imaging lens consisting essentially of a first lens having a negative power, a second lens having a positive power, a third lens having a negative power, a fourth lens having a positive power, a fifth lens having a positive power, and a sixth lens having a negative power in this order from the object side, wherein an aperture stop is disposed toward the object side than the image-side surface of the fourth lens, the Abbe number of the material of the third lens with respect to the d-line is less than or equal to 30, and the imaging lens satisfies conditional formula (4) below: f56/f<−6.4 (4),wheref: the focal length of the entire system, andf56: the combined focal length of the fifth lens and the sixth lens. | ||
| 地址 | Tokyo JP | ||