| 发明名称 |
ZOOM LENS, IMAGING DEVICE AND METHOD FOR MANUFACTURING THE ZOOM LENS |
| 摘要 |
The art has, disposed in order from an object, a first lens group (G1) having positive refractive power, a second lens group (G2) having negative refractive power, a third lens group (G3) having negative refractive power, and a fourth lens group (G4) having positive refractive power, in which zooming is made by varying an air distance between the first lens group (G1) and the second lens group (G2), and the following conditional expression (1) is satisfied:;0.60<f4/fw<1.15 (1)where f4 denotes a focal distance of the fourth lens group (G4), andfw denotes a focal distance of a zoom lens in a wide-angle end state upon focusing on infinity. |
| 申请公布号 |
US2017068074(A1) |
申请公布日期 |
2017.03.09 |
| 申请号 |
US201615256740 |
申请日期 |
2016.09.06 |
| 申请人 |
Nikon Corporation |
发明人 |
MATSUO Taku;SATO Haruo |
| 分类号 |
G02B15/17;G02B5/00;G02B27/64;G02B27/00 |
主分类号 |
G02B15/17 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A zoom lens, comprising: disposed in order from an object, a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group having negative refractive power; and a fourth lens group having positive refractive power, wherein
zooming is made by varying an air distance between the first lens group and the second lens group, and the following conditional expression is satisfied:
0.60<f4/fw<1.15 where f4 denotes a focal length of the fourth lens group, and fw denotes a focal length of the zoom lens in a wide-angle end state upon focusing on infinity. |
| 地址 |
Tokyo JP |
