| 发明名称 |
ZOOM LENS SYSTEM |
| 摘要 |
Provided is a zoom lens system including: a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group having a positive refractive power; and a fourth lens group having a negative refractive power sequentially from an object side to an image side, wherein a zooming operation is performed by moving the second lens group and the fourth lens group. |
| 申请公布号 |
US2014300974(A1) |
申请公布日期 |
2014.10.09 |
| 申请号 |
US201313972471 |
申请日期 |
2013.08.21 |
| 申请人 |
SAMSUNG TECHWIN CO., LTD. |
发明人 |
LEE Byoung-Guy |
| 分类号 |
G02B15/14 |
主分类号 |
G02B15/14 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A zoom lens system comprising, sequentially from an object side to an image side:
a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group having a positive refractive power; and a fourth lens group having a negative refractive power, wherein a zooming operation is performed by moving the second lens group and the fourth lens group under a following condition:
0.25<f1/ft<0.31, where f1 denote a focal length of the first lens group, and ft denotes a focal length of the zoom lens system at a telephoto end. |
| 地址 |
Changwon-city KR |
