Invention Grant
US08699143B2 Wide-angle lens, imaging apparatus, and method for manufacturing wide-angle lens 有权
广角镜头,成像装置以及制造广角镜的方法

  • Patent Title: Wide-angle lens, imaging apparatus, and method for manufacturing wide-angle lens
  • Patent Title (中): 广角镜头,成像装置以及制造广角镜的方法
  • Application No.: US12917753
    Application Date: 2010-11-02
  • Publication No.: US08699143B2
    Publication Date: 2014-04-15
  • Inventor: Haruo Sato
  • Applicant: Haruo Sato
  • Applicant Address: JP Tokyo
  • Assignee: Nikon Corporation
  • Current Assignee: Nikon Corporation
  • Current Assignee Address: JP Tokyo
  • Agency: Miles & Stockbridge P.C.
  • Priority: JP2009-257359 20091110; JP2009-257367 20091110; JP2009-257385 20091110
  • Main IPC: G02B15/14
  • IPC: G02B15/14 G02B13/18
Wide-angle lens, imaging apparatus, and method for manufacturing wide-angle lens
Abstract:
Including: a front lens group Gf disposed to an object side of an aperture stop; and a rear lens group Gr disposed to an image side of the aperture stop; the front lens group including a sub-lens group Ga having negative refractive power, the sub-lens group Ga including, in order from the most object side, at least three negative lenses, at least one of the three negative lens being an aspherical negative meniscus lens, the aspherical negative meniscus lens having a shape that negative refractive power is getting smaller from the center to the periphery, a cemented lens constructed by a positive lens, a negative lens, and a positive lens being disposed to the image side of the sub-lens group Ga, and given conditional expressions being satisfied, thereby providing a wide-angle lens having high optical performance with a wide angle of view.
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