| 发明名称 |
IMAGING LENS |
| 摘要 |
The present invention relates to an imaging lens, the imaging lens including, in an ordered way from an object side, a first lens having positive (+) refractive power, a second lens having negative (−) refractive power, a third lens having negative (−) refractive power, a fourth lens having negative (−) refractive power, wherein the imaging lens meets a conditional expression of −0.5<f/f3<0 and −0.5<f/f4<0, where f is an entire focus distance of the imaging lens, f3 is a focus distance of the third lens, and f4 is a focus distance of the fourth lens. |
| 申请公布号 |
US2016299318(A1) |
申请公布日期 |
2016.10.13 |
| 申请号 |
US201615189804 |
申请日期 |
2016.06.22 |
| 申请人 |
LG INNOTEK CO., LTD. |
发明人 |
KWON Dukkeun |
| 分类号 |
G02B13/00;G02B9/34;H04N5/225;G02B27/00 |
主分类号 |
G02B13/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An imaging lens, comprising in an ordered way from an object side:
a first lens having positive (+) refractive power; a second lens having negative (−) refractive power; a third lens having negative (−) refractive power; and a fourth lens having negative (−) refractive power; wherein the imaging lens meets a conditional expression of 0.5<f/f1<1.5, where f is an entire focus distance of the imaging lens, and fl is a focus distance of the first lens, wherein the imaging lens meets a conditional expression of 0.5<ΣT/f<1.5, where f is an entire focus distance of the imaging lens, and ΣT is a distance from an object side surface of the first lens to an image-forming surface, and wherein the imaging lens meets conditional expressions of: a) 10<[(V1+V3)/2−V2]<20 and V3<30, and b) 10<[(V1+V4)/2−V2]<20 and V4<30; where V1, V2, V3, and V4 are Abbe's numbers of the first to fourth lenses, respectively. |
| 地址 |
Seoul KR |
