专利名称：Systems and methods for evaluating the
appearance of a gemstone
发明人：Ilene M. Reinitz,Mary L. Johnson,James E.
Shigley,Thomas S. Hemphill
申请号：US11387361申请日：20060322公开号：US07834987B2公开日：20101116
专利附图：
摘要：Of the “four C's,” cut has historically been the most complex to understandand assess. This application presents a three-dimensional mathematical model o study
the interaction of light with a fully faceted, colorless, symmetrical round-brilliant-cutdiamond. With this model, one can analyze how various appearance factors (brilliance,fire, and scintillation) depend on proportions. The model generates images and anumerical measurement of the optical efficiency of the round brilliant-called DCLR—which approximates overall fire. DCLR values change with variations in cut proportions, inparticular crown angle, pavilion angle, table size, star facet length, culet size, and lowergirdle facet length. The invention describes many combinations of proportions with equalor higher DCLR than “Ideal” cuts, and these DCLR ratings may be balanced with otherfactors such as brilliance and scintillation to provide a cut grade for an existing diamondor a cut analysis for prospective cut of diamond rough.
申请人：Ilene M. Reinitz,Mary L. Johnson,James E. Shigley,Thomas S. Hemphill
地址：New York NY US,San Diego CA US,Temecula CA US,Lexington MA US
国籍：US,US,US,US
代理机构：DLA Piper LLP (US)
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