| 发明名称 |
Photographic Lens Optical System |
| 摘要 |
A photographic lens optical system includes: a first lens having a negative refractive power and a meniscus shape convex toward an object side; a second lens having a positive refractive power and a shape convex toward an image side; a third lens having a positive refractive power and a double convex shape; and a fourth lens having a negative refractive power and a shape convex toward the image side, wherein the first to fourth lenses are sequentially arranged in a direction from the object side to the image side, and the photographic lens optical system satisfies the following condition:;0.15<|(tan θ)/f|<0.25where θ and f denote an angle of view and a focal length of the photographic lens optical system, respectively. |
| 申请公布号 |
US2015177486(A1) |
申请公布日期 |
2015.06.25 |
| 申请号 |
US201414567651 |
申请日期 |
2014.12.11 |
| 申请人 |
Kolen Co., Ltd. |
发明人 |
Ahn Chi Ho;Song Kyoung Soo;Kim Ji Eun;Kang Chan Goo;Bae Seong Hee |
| 分类号 |
G02B13/00;G02B9/34;G03B13/32 |
主分类号 |
G02B13/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A photographic lens optical system comprising:
a first lens having a negative refractive power and a meniscus shape convex toward an object side; a second lens having a positive refractive power and a shape convex toward an image side; a third lens having a positive refractive power and a double convex shape; and a fourth lens having a negative refractive power and a shape convex toward the image side, wherein the first to fourth lenses are sequentially arranged in a direction from the object side to the image side, and the photographic lens optical system satisfies the following condition:
0.15<|(tan θ)/f|<0.25 where θ and f denote an angle of view and a focal length of the photographic lens optical system, respectively. |
| 地址 |
Seongnam-si KR |
