发明授权
- 专利标题: Variable magnification optical system
- 专利标题(中): 变倍光学系统
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申请号: US934914申请日: 1986-11-25
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公开(公告)号: US4830474A公开(公告)日: 1989-05-16
- 发明人: Hiroki Nakayama , Yasuhisa Sato , Kouji Oizumi , Yasuyuki Yamada
- 申请人: Hiroki Nakayama , Yasuhisa Sato , Kouji Oizumi , Yasuyuki Yamada
- 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: JPX60-280058 19851212; JPX60-280061 19851212
- 主分类号: G02B15/10
- IPC分类号: G02B15/10
摘要:
A changeover type variable magnification optical system whose focal length is changed by locating an auxiliary lens on the image side of a master lens assembly. The system satisfies following inequalities of:0.2
公开/授权文献
- US5297536A Method for use in intra-abdominal surgery 公开/授权日:1994-03-29
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