| 发明名称 |
VARIABLE-POWER OPTICAL SYSTEM |
| 摘要 |
A variable-power optical system includes, in order from an object, an objective optical system (O), a relay optical system (R), and an eyepiece optical system (E), wherein the relay optical system is provided with, in order from the object, a first lens group (G1) having positive refractive power, a second lens group (G2) having positive refractive power, and a third lens group (G3) having positive refractive power, and is an optical system in which an image formed by the objective optical system with variable optical power, and the variable-power optical system is configured so as to satisfy expressions: 0.7<|β|min<1.4, and 12 (mm)<fmin<15 (mm), where |β|min denotes a minimum of absolute value of imaging magnification of the relay optical system, and fmin denotes a shortest focal length. |
| 申请公布号 |
US2016356996(A1) |
申请公布日期 |
2016.12.08 |
| 申请号 |
US201615241370 |
申请日期 |
2016.08.19 |
| 申请人 |
NIKON VISION CO., LTD |
发明人 |
MIYAZAKI Yosuke |
| 分类号 |
G02B15/16;G02B27/00;G02B23/16 |
主分类号 |
G02B15/16 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A variable-power optical system comprising, in order from an object, an objective optical system, a relay optical system, and an eyepiece optical system,
the relay optical system is provided with, in order from the object, a first lens group having positive refractive power, a second lens group having positive refractive power, and a third lens group having positive refractive power, and an optical system in which an image to be formed by the objective optical system with variable optical power, and the variable-power optical system satisfies the following conditional expressions (1) and (2):
0.7<|β|min<1.4 (1)12 (mm)<fmin<15 (mm) (2)where |β|min denotes a minimum of absolute value of imaging magnification of the relay optical system, and fmin denotes a shortest focal length. |
| 地址 |
Tokyo JP |
