发明授权
- 专利标题: Objective for endoscopes
- 专利标题(中): 内镜目的
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申请号: US309410申请日: 1981-10-07
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公开(公告)号: US4403837A公开(公告)日: 1983-09-13
- 发明人: Ken-ichi Nakahashi
- 申请人: Ken-ichi Nakahashi
- 申请人地址: JPX Tokyo
- 专利权人: Olympus Optical Co., Ltd.
- 当前专利权人: Olympus Optical Co., Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX55-139904 19801008
- 主分类号: G02B9/60
- IPC分类号: G02B9/60 ; G02B13/04 ; G02B23/24 ; G02B5/16
摘要:
An objective for endoscopes comprising a first, second, third, fourth and fifth lens components in which the first lens component is a negative meniscus lens having a convex surface on the object side, the second lens component is a positive meniscus lens having a concave surface on the object side, the third lens component is a positive lens, the fourth lens component is a cemented lens consisting of a positive lens element and a negative lens element cemented to said positive lens element, and the fifth lens component is a positive lens, the objective for endoscopes having a very wide angle of view and well corrected aberrations.
公开/授权文献
- US5537266A Tape loading device and magnetic conversion apparatus 公开/授权日:1996-07-16