| 发明名称 |
LIGHT AMOUNT ADJUSTMENT DEVICE, OPTICAL DEVICE, AND IMAGE CAPTURING APPARATUS |
| 摘要 |
A device according to the present invention includes at least one first light amount adjustment blade moving rectilinearly in a direction crossing a light passage direction and at least one second light amount adjustment blade pivoting within a plane crossing the light passage direction. When a light passage aperture of a polygonal shape formed by annularly superposing the first light amount adjustment blade and the second light amount adjustment blade is enlarged, a shape of the light passage aperture comes close to a circular shape from a polygonal shape. |
| 申请公布号 |
US2015346583(A1) |
申请公布日期 |
2015.12.03 |
| 申请号 |
US201514823182 |
申请日期 |
2015.08.11 |
| 申请人 |
CANON DENSHI KABUSHIKI KAISHA |
发明人 |
Yoshizawa Takahito;Miyashita Kyousuke |
| 分类号 |
G03B9/06;G03B9/14 |
主分类号 |
G03B9/06 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A light amount adjustment device comprising:
at least one first light amount adjustment blade configured to move rectilinearly in a direction crossing a light passage direction; and at least one second light amount adjustment blade configured to pivot within a plane crossing the light passage direction, wherein when a light passage aperture of a polygonal shape formed by annularly superposing the first light amount adjustment blade and the second light amount adjustment blade is enlarged, a shape of the light passage aperture comes close to a circular shape from a polygonal shape. |
| 地址 |
Chichibu-shi JP |
