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Compact eyepiece using an imersed field lens

  • US 8,456,745 B2
  • Filed: 05/12/2011
  • Issued: 06/04/2013
  • Est. Priority Date: 05/12/2010
  • Status: Active Grant
First Claim
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1. An optical magnifying eyepiece comprising:

  • a flat immersed object surface;

    said eyepiece further comprising at least one concave reflecting surface;

    and at least one negative lens element anda plurality of positive lens elements having primarily convex refracting surfaces wherein a radii of said convex refracting surfaces are not all the same sign and said surfaces are axially combined sections of spheres; and

    further wherein said eyepiece produces a distortion free image over a wide field of view when said immersed object surface is observed from an external viewing position.

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