ALEXANDRIA, Va., July 30 -- United States Patent no. 12,372,467, issued on July 29, was assigned to Gemological Institute of America Inc. (GIA) (Carlsbad, Calif.).
"Apparatus and method for fluorescence grading of gemstones" was invented by Hiroshi Takahashi (Morristown, N.J.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided herein is an apparatus for assessing a fluorescence characteristic of a gemstone. The apparatus comprises an optically opaque platform for supporting a gemstone to be assessed, one or more light source to provide uniform UV and non-UV illumination, an image capturing component, and a telecentric lens positioned to provide fluorescent images of the illuminated gemstone to the image ...