| 发明名称 |
IMAGING LENS |
| 摘要 |
An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; a third lens having positive refractive power; a fourth lens; a fifth lens; and a sixth lens, arranged in this order from an object side to an image plane side. The fifth lens is formed in a shape so that a surface thereof on the image plane side has a positive curvature radius. The fifth lens and the sixth lens have a specific composite focal length. The first lens is disposed away from the second lens by a specific distance on an optical axis thereof. The second lens is disposed away from the third lens by a specific distance. |
| 申请公布号 |
US2016356989(A1) |
申请公布日期 |
2016.12.08 |
| 申请号 |
US201615053168 |
申请日期 |
2016.02.25 |
| 申请人 |
OPTICAL LOGIC INC. ;KANTATSU CO., LTD. |
发明人 |
KUBOTA Yoji;KUBOTA Kenichi;HIRANO Hitoshi;FUKAYA Hisao |
| 分类号 |
G02B13/00;G02B9/62;G02B27/00 |
主分类号 |
G02B13/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An imaging lens comprising:
a first lens having positive refractive power; a second lens having negative refractive power; a third lens having positive refractive power; a fourth lens; a fifth lens; and a sixth lens, arranged in this order from an object side to an image plane side, wherein said fifth lens is formed in a shape so that a surface thereof on the image plane side has a positive curvature radius, and said fifth lens and said sixth lens have a composite focal length f56, said first lens is disposed away from the second lens by a distance D12 on an optical axis thereof, and said second lens is disposed away from the third lens by a distance D23 on the optical axis so that the following conditional expressions are satisfied:
f56<02<D23/D12<200.3<(D12/f)×100<1.52<(D23/f)×100<10where f is a focal length of a whole lens system. |
| 地址 |
Nagano JP |
