发明名称 |
Projection optical system |
摘要 |
A projection optical system is disclosed with which undistorted images can be obtained at any image position within a specification range, and whose projection angle can be changed. The projection optical system includes a plurality of optical elements and a first optical system constituted by at least one of the plurality of optical elements having the ability to form an image with light onto a predetermined surface different from the projection surface. A projection image of the original image can be moved by rotating a first optical element of the plurality of optical elements substantially around a center of an exit pupil position of the first optical system as the rotation center.
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申请公布号 |
US7252389(B2) |
申请公布日期 |
2007.08.07 |
申请号 |
US20060345523 |
申请日期 |
2006.02.02 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
HATAKEYAMA KOSHI;SUNAGA TOSHIHIRO |
分类号 |
G02B13/00;G03B21/28;G02B17/00;G02B17/08;G02B27/18;G03B21/00;H04N5/74 |
主分类号 |
G02B13/00 |
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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