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: US552965申请日: 1983-11-17
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公开(公告)号: US4645312A公开(公告)日: 1987-02-24
- 发明人: Kazuo Ikari
- 申请人: Kazuo Ikari
- 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: JPX57-204603 19821124
- 主分类号: G02B9/62
- IPC分类号: G02B9/62
摘要:
A photographic lens system having a field angle of 70.degree. or wider and designed for use with compact cameras having a relative aperture of F/3.5 comprising a first positive meniscus lens component having a convex surface on the object side, a second positive meniscus lens component having a convex surface on the object side, a third negative meniscus lens component having a convex surface on the object side, a fourth lens component having positive refractive power, and a fifth lens component comprising a negative lens element and having positive refractive power as a whole.
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