System and method for computerized evaluation of gemstones

  • US RE44,963 E1
  • Filed: 12/06/2010
  • Issued: 06/24/2014
  • Est. Priority Date: 01/10/1997
  • Status: Expired due to Term
First Claim
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1. A method for grading the cut of a gemstone, comprising the steps of:

  • illuminating a computerized gemstone model using an a computerized illumination model, wherein said gemstone model is a full three-dimensional (3D) representation of said gemstone that defines the geometry and position of all of the gemstone facets, and wherein said illumination model produces a light beam;

    refracting said light beam into said gemstone model through a first facet of said gemstone model to produce a refracted light beam, said refracted light beam via said first facet of said gemstone model is modeled with a three-dimensional shape and the three-dimensional shape of the refracted light beam is defined by an area of said first facet;

    reflecting said refracted light beam within said gemstone model from a second facet of said gemstone model to produce a reflected light beam;

    refracting said refracted light beam out of said gemstone model through said second facet of said gemstone model;

    refracting said refracted and reflected light beams beam out of said gemstone model through a third facet of said gemstone model to produce an exiting light beam; and

    measuring said exiting light beam.

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