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US07742243B2 Projection lens with high resolution and reduced overall length 失效
具有高分辨率和缩短整体长度的投影镜头

  • Patent Title: Projection lens with high resolution and reduced overall length
  • Patent Title (中): 具有高分辨率和缩短整体长度的投影镜头
  • Application No.: US11952974
    Application Date: 2007-12-07
  • Publication No.: US07742243B2
    Publication Date: 2010-06-22
  • Inventor: Chun-Ling Lin
  • Applicant: Chun-Ling Lin
  • Applicant Address: TW Tu-Cheng, Taipei Hsien
  • Assignee: Hon Hai Precision Industry Co., Ltd.
  • Current Assignee: Hon Hai Precision Industry Co., Ltd.
  • Current Assignee Address: TW Tu-Cheng, Taipei Hsien
  • Agent Zhigang Ma
  • Priority: CN200710201467 20070824
  • Main IPC: G02B9/04
  • IPC: G02B9/04
Projection lens with high resolution and reduced overall length
Abstract:
An exemplary projection lens includes, in this order from the magnification side to the minification side thereof, a negative lens group of negative fraction power, and a positive lens group of positive fraction power. The projection lens satisfies the formulas of: −2.5
Abstract(Chinese):

示例性的投影透镜从其放大倍率到细化侧依次包括负分数倍的负透镜组和正分光焦度的正透镜组。 投影透镜满足以下公式：-2.5

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