| 发明名称 | Imaging lens system | ||
| 摘要 | An imaging lens system includes, sequentially from an object side to an image side: a first lens having a positive refractive power; a second lens having a negative refractive power; and a third lens having a positive refractive power or a negative refractive power, wherein a viewing angle θ satisfies following condition, 0.7<|tan θ|<1.5. | ||
| 申请公布号 | US9134508(B2) | 申请公布日期 | 2015.09.15 |
| 申请号 | US201314068679 | 申请日期 | 2013.10.31 |
| 申请人 | KOLEN CO., LTD. | 发明人 | Ahn Chi Ho;Cho Jae Hoon;Kim Ji Eun;Kang Chan Goo;Kim Se Jin |
| 分类号 | G02B3/02;G02B13/00 | 主分类号 | G02B3/02 |
| 代理机构 | St. Onge Steward Johnston & Reens LLC | 代理人 | St. Onge Steward Johnston & Reens LLC |
| 主权项 | 1. An imaging lens system comprising, sequentially from an object side to an image plane side: a first lens having a positive refractive power; a second lens having a negative refractive power; and a third lens having a positive refractive power or a negative refractive power, wherein a viewing angle θ satisfies following condition, 0.7<|tan θ|<1.5, wherein the imaging lens system further satisfies following condition, 4.8<f/D1<5.0, where f denotes a focal length of the imaging lens system, and D1 is a semi-aperture of the first lens at the object side. | ||
| 地址 | KR | ||