发明授权
US07317582B2 Zoom lens, video enlarging/projecting system, video projector, rear projector, and multivision system
有权
变焦镜头，视频放大/投影系统，视频投影机，后投影机和多功能系统
- 专利标题： Zoom lens, video enlarging/projecting system, video projector, rear projector, and multivision system
- 专利标题（中）： 变焦镜头，视频放大/投影系统，视频投影机，后投影机和多功能系统
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申请号： US10530528申请日： 2003-10-15
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公开(公告)号： US07317582B2公开(公告)日： 2008-01-08
- 发明人: Syunsuke Kimura , Masayuki Takahashi , Yoshiharu Yamamoto
- 申请人： Syunsuke Kimura , Masayuki Takahashi , Yoshiharu Yamamoto
- 申请人地址： JP Osaka
- 专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址： JP Osaka
- 代理机构： Hamre, Schumann, Mueller & Larson, P.C.
- 优先权： JP2002-301028 20021015; JP2002-301029 20021015; JP2002-301030 20021015
- 国际申请： PCT/JP03/13167 WO 20031015
- 国际公布： WO2004/040350 WO 20040513
- 主分类号： G02B15/14
- IPC分类号： G02B15/14
摘要：
The present invention includes three or more lens groups. These are arranged in the order of a first lens group (11) that has positive refractive power and a second lens group (12) that has negative refractive power, as seen from the side having the longer conjugate distance, wherein a first lens (12a) of the lenses of the second lens group (12), as seen from the side having the longer conjugate distance, has positive refractive power. Thus, it is possible to suppress distortion aberration to a small value.
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