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Compact lens assembly for the teleportal augmented reality system

  • US 6,731,434 B1
  • Filed: 03/01/2002
  • Issued: 05/04/2004
  • Est. Priority Date: 05/23/2001
  • Status: Expired due to Term
First Claim
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1. A compact lens assembly comprising:

  • a positive convex-concave singlet lens;

    a plastic singlet lens adjacent to the positive lens, having one face being an aspheric substrate plus a diffractive optical surface;

    a mid-located stop/shutter positioned adjacent to the singlet lens;

    a plastic singlet negative lens with an aspheric surface on one of the faces adjacent to the stop/shutter; and

    a glass singlet lens adjacent to the negative lens, whereby the diffractive lens and the glass lens, and combination of the plastic and glass lens allows for visible spectrum images without smears and reduced weight.

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