| 发明名称 |
Endoscope Objective Optical System |
| 摘要 |
Provided is an endoscope objective optical system including, in order from an object side, an aperture stop, a front group having positive refractive power, and a rear group having positive refractive power, in which the rear group is formed by joining a single lens having positive refractive power and a single lens having negative refractive power and is joined to an imaging device; a joining surface between the single lenses has positive refractive power; and the endoscope objective optical system satisfies following Conditional Expression (1):;0.15<fF/fR<0.5, (1);where fF indicates a focal length of the front group, and fR indicates a focal length of the rear group. |
| 申请公布号 |
US2014155694(A1) |
申请公布日期 |
2014.06.05 |
| 申请号 |
US201314100257 |
申请日期 |
2013.12.09 |
| 申请人 |
Olympus Medical Systems Corp. |
发明人 |
Murata Keiji |
| 分类号 |
G02B23/24;A61B1/00;A61B1/055 |
主分类号 |
G02B23/24 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An endoscope objective optical system comprising: in order from an object side, an aperture stop; a front group having positive refractive power; and a rear group having positive refractive power,
wherein the rear group is formed by joining a single lens having positive refractive power and a single lens having negative refractive power and is joined to an imaging device; a joining surface between the single lenses has positive refractive power; and the endoscope objective optical system satisfies following Conditional Expression (1):
0.15<fF/fR<0.5, (1)where fF indicates a focal length of the front group, and fR indicates a focal length of the rear group.
|
| 地址 |
Tokyo JP |
