发明授权
US4645312A Photographic lens system 失效
摄影镜头系统

  • 专利标题: Photographic lens system
  • 专利标题(中): 摄影镜头系统
  • 申请号: US552965
    申请日: 1983-11-17
  • 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
Photographic lens system
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.
信息查询
0/0