| 发明名称 | Imaging optical system, lens unit, and image projection apparatus | ||
| 摘要 | An imaging optical system includes a lens unit that includes a plurality of optical elements, and an optical path combining portion that includes a flat plate disposed so as to be inclined with respect to an optical axis of the lens unit, and the lens unit includes a correction portion that has a shape asymmetric with respect to the optical axis in a cross section that is parallel to both a normal of the flat plate and the optical axis. | ||
| 申请公布号 | US8864319(B2) | 申请公布日期 | 2014.10.21 |
| 申请号 | US201213563939 | 申请日期 | 2012.08.01 |
| 申请人 | Canon Kabushiki Kaisha | 发明人 | Inoko Kazuhiro |
| 分类号 | G03B21/20;G02B27/00;G02B13/16;G02B15/14 | 主分类号 | G03B21/20 |
| 代理机构 | Rossi, Kimms & McDowell LLP | 代理人 | Rossi, Kimms & McDowell LLP |
| 主权项 | 1. An imaging optical system comprising: a lens unit that includes a plurality of optical elements; and an optical path combining portion that includes a flat plate disposed so as to be inclined with respect to an optical axis of the lens unit, wherein the lens unit includes a correction portion that has a shape asymmetric with respect to the optical axis in a cross section that is parallel to both a normal of the flat plate and the optical axis. | ||
| 地址 | JP | ||