发明名称 |
Image pickup optical system and optical apparatus using the same |
摘要 |
An image pickup optical system includes, in order from the object side, a front unit having at least one reflecting surface with power that is rotationally asymmetrical, an aperture stop, and a rear unit having at least one reflecting surface with power that is rotationally asymmetrical. In this case, F-numbers in two directions perpendicular to each other on a plane perpendicular to the optical axis are different. Decentration takes place in one of the two directions and the F-number in a direction perpendicular to a decentering direction is smaller than that in the decentering direction. When the F-number in the decentering direction is represented by FNY and the F-number in the direction perpendicular to the decentering direction is represented by FNX, the optical system satisfies the following condition: 1.1<FNY/FNX<2.0
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申请公布号 |
US2005046952(A1) |
申请公布日期 |
2005.03.03 |
申请号 |
US20040902302 |
申请日期 |
2004.07.30 |
申请人 |
NAGATA TETSUO;SATO TOMOKO;SAKURAI AKIHIRO;ISHII TETSUYA;TAKAHASHI TAKESHI;MATSUMOTO KAZUHIRO |
发明人 |
NAGATA TETSUO;SATO TOMOKO;SAKURAI AKIHIRO;ISHII TETSUYA;TAKAHASHI TAKESHI;MATSUMOTO KAZUHIRO |
分类号 |
G02B17/08;G02B25/00;G02B26/08;G02B27/00;G02B27/01;H04N5/225;H04N101/00;(IPC1-7):G02B27/10 |
主分类号 |
G02B17/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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