发明授权
- 专利标题: Zoom lens system with movable diaphragm
- 专利标题(中): 变焦镜头系统,带可动隔膜
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申请号: US55073申请日: 1979-07-05
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公开(公告)号: US4299453A公开(公告)日: 1981-11-10
- 发明人: Kikuo Momiyama , Shigeru Kamata
- 申请人: Kikuo Momiyama , Shigeru Kamata
- 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: JPX53-82280 19780706
- 主分类号: G02B15/16
- IPC分类号: G02B15/16 ; G02B15/177 ; G02B15/14
摘要:
The present invention relates to an objective lens for zooming by varying the distance between the divergent front lens group and the convergent rear lens group consisting of a first sub-group for forming a convergent light beam and a second sub-group between which sub-groups a photographing aperture is provided so as to be independent from them, whereby when the rear lens group is displaced forward for zooming the photographing aperture is displaced backward with reference to the first sub-group.
公开/授权文献
- US5450532A Cache memory system for a color ink jet printer 公开/授权日:1995-09-12
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