| 发明名称 |
IMAGE PICKUP LENS AND IMAGE PICKUP APPARATUS |
| 摘要 |
An image pickup lens includes: a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group having positive refractive power; and a fourth lens group having negative refractive power, arranged in order from an object side to an image side, the fourth lens group being configured to travel along an optical axis through focusing operation. In the image pickup lens, following conditional expression (1) is satisfied,;f/f4<−0.35 (1);where f is a total focal length of the image pickup lens, and f4 is a focal length of the fourth lens group. |
| 申请公布号 |
US2014204265(A1) |
申请公布日期 |
2014.07.24 |
| 申请号 |
US201314089797 |
申请日期 |
2013.11.26 |
| 申请人 |
Sony Corporation |
发明人 |
Sunaga Toshihiro |
| 分类号 |
G02B15/14;H04N5/225 |
主分类号 |
G02B15/14 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An image pickup lens comprising:
a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group having positive refractive power; and a fourth lens group having negative refractive power, arranged in order from an object side to an image side, the fourth lens group being configured to travel along an optical axis through focusing operation, wherein following conditional expression (1) is satisfied,
f/f4<−0.35 (1) where f is a total focal length of the image pickup lens, and f4 is a focal length of the fourth lens group. |
| 地址 |
Tokyo JP |
