发明授权
US08976457B2 Projection lens system and projector 有权
投影镜头系统和投影机

  • 专利标题: Projection lens system and projector
  • 专利标题(中): 投影镜头系统和投影机
  • 申请号: US13882472
    申请日: 2011-10-25
  • 公开(公告)号: US08976457B2
    公开(公告)日: 2015-03-10
  • 发明人: Kazuhiko Inoue
  • 申请人: Kazuhiko Inoue
  • 申请人地址: JP Tokyo
  • 专利权人: Konica Minolta, Inc.
  • 当前专利权人: Konica Minolta, Inc.
  • 当前专利权人地址: JP Tokyo
  • 代理机构: Cozen O'Connor
  • 优先权: JP2010-242288 20101028
  • 国际申请: PCT/JP2011/074505 WO 20111025
  • 国际公布: WO2012/057110 WO 20120503
  • 主分类号: G02B15/14
  • IPC分类号: G02B15/14 G02B13/16 G02B15/177
Projection lens system and projector
摘要:
An aperture stop is arranged on the reduction side of the most reduction-side lens element in a fourth group; during zooming from the tele-end to the wide-end through a middle position that fulfills conditional formula 0.99
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