Invention Grant
US07782553B2 Imaging lens 有权
成像镜头

  • Patent Title: Imaging lens
  • Patent Title (中): 成像镜头
  • Application No.: US12315171
    Application Date: 2008-11-25
  • Publication No.: US07782553B2
    Publication Date: 2010-08-24
  • Inventor: Masato Nakamura
  • Applicant: Masato Nakamura
  • Applicant Address: JP Saitama
  • Assignee: ENPLAS Corporation
  • Current Assignee: ENPLAS Corporation
  • Current Assignee Address: JP Saitama
  • Agent William L. Androlia; H. Henry Koda
  • Priority: JP2007-307252 20071128
  • Main IPC: G02B9/06
  • IPC: G02B9/06
Imaging lens
Abstract:
It is to provide an imaging lens that has excellent optical performance while being compact and light. The imaging lens includes, in order from an object side to an image surface side, a diaphragm, a first lens that is a meniscus lens having a positive power whose convex surface faces the object side, and a second lens that is a meniscus lens having a positive power whose convex surface faces the image surface side, wherein a condition expressed by −30.5≦r3/d3≦−19 (where, r3: center radius curvature of the object side face of the second lens, and d3: center thickness of the second lens is to be satisfied.
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