Invention Grant
US08456745B2 Compact eyepiece using an imersed field lens 有权
紧凑的目镜使用过滤的镜头

  • Patent Title: Compact eyepiece using an imersed field lens
  • Patent Title (中): 紧凑的目镜使用过滤的镜头
  • Application No.: US13106819
    Application Date: 2011-05-12
  • Publication No.: US08456745B2
    Publication Date: 2013-06-04
  • Inventor: Paul Weissman
  • Applicant: Paul Weissman
  • Applicant Address: US NY Brewster
  • Assignee: Jill Weissman
  • Current Assignee: Jill Weissman
  • Current Assignee Address: US NY Brewster
  • Agent Gerow D. Brill
  • Main IPC: G02B27/14
  • IPC: G02B27/14 G02B17/00
Compact eyepiece using an imersed field lens
Abstract:
A first embodiment is a lens system having a plurality of refractive and reflective spherical elements that work as a magnifier to produce a distortion free, less than 1%, image with optical correction over a wide field of view. The system has at least one concave reflecting surface, and at least three convex refracting surfaces with the sign of the radius of one of the convex refracting surfaces being opposite of the sign of the radius of remaining two convex refracting surfaces. A second embodiment is a lens having a concave reflecting element which is on a substrate that is a negative lens by transmission with an index of refraction between 1.6 2.0 and a dispersion 49 15. This is used in combination with at least 3 positive refracting surfaces with less dispersive power than the negative element and with the sign of the radius of one of the positive elements being opposite from the sign of the radius of the remaining positive elements.
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