发明授权
- 专利标题： High range zoom lens
- 专利标题（中）： 高范围变焦镜头
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申请号： US657762申请日： 1984-10-04
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公开(公告)号： US4639096A公开(公告)日： 1987-01-27
- 发明人: Nozomu Kitagishi , Kikuo Momiyama , Keiji Ikemori , Sadatoshi Takahashi , Tsunefumi Tanaka
- 申请人： Nozomu Kitagishi , Kikuo Momiyama , Keiji Ikemori , Sadatoshi Takahashi , Tsunefumi Tanaka
- 申请人地址： JPX Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX58-187398 19831006
- 主分类号： G02B15/20
- IPC分类号： G02B15/20 ; G02B15/173 ; G02B15/14
摘要：
The disclosed zoom lens is composed of four lens groups. Counting from the front, the first lens group has a positive power, the second a negative power, the third a positive power and the fourth a positive or a negative power. At least the first, third and fourth lens groups are movable for zooming. The zoom lens satisfies the following conditions:-3
公开/授权文献
- US5697721A Injection moldable sheet binder 公开/授权日：1997-12-16
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