发明授权
- 专利标题: Photographic lens system
- 专利标题(中): 摄影镜头系统
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申请号: US642437申请日: 1991-01-17
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公开(公告)号: US5139342A公开(公告)日: 1992-08-18
- 发明人: Hiroshi Matsuzaki
- 申请人: Hiroshi Matsuzaki
- 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: JPX007231/90 19900118
- 主分类号: G02B13/18
- IPC分类号: G02B13/18 ; G02B9/36
摘要:
A photographic lens system comprising, in the order from the object side, a first lens component which is designed as a cemented doublet consisting of a positive lens element and a negative lens element in this order, a second lens component which is designed as a cemented doublet consisting of a negative lens element and a positive lens element in this order, and an aperture stop arranged between said first lens component and said second lens component, and using at least the aspherical surface therein. This photographic lens system comprises a small number of lens elements, and has a high aperture ratio and favorably corrected aberrations.
公开/授权文献
- US5752319A Cutting means removably attached to polybag to be opened 公开/授权日:1998-05-19
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