发明授权
- 专利标题： Zoom lens having weak front lens group
- 专利标题（中）： 变焦镜头具有较弱的前镜组
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申请号： US148811申请日： 1993-11-08
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公开(公告)号： US5493448A公开(公告)日： 1996-02-20
- 发明人: Ellis I. Betensky , Melvyn H. Kreitzer
- 申请人： Ellis I. Betensky , Melvyn H. Kreitzer
- 申请人地址： NY Rochester
- 专利权人： Eastman Kodak Company
- 当前专利权人： Eastman Kodak Company
- 当前专利权人地址： NY Rochester
- 主分类号： G02B13/18
- IPC分类号： G02B13/18 ; G02B15/16 ; G02B15/14
摘要：
A zoom lens having two groups of lens components including from the object side a positive group and a negative group. The positive group includes two lens units, a weak unit, and a positive unit, while the negative group has at least one negative lens component and provides most of the magnification change during zooming.
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