Apparatus and method for examining the shape of gemstones
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United States of America Patent
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May 20, 2003
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N/A
app pub date -
Aug 31, 2000
filing date -
Oct 29, 1998
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Abstract
A method for examining a gemstone includes the steps of coating the gemstone with a removable diffusing coating and determining the silhouette of the gemstone in three dimensions. The method further includes performing structured light triangulation by using laser light to obtain an image of the surface of the gemstone, the gemstone being transparent and/or reflective to the laser light in the absence of the coating. The method further includes the step of using the silhouette in conjunction with the image to determine the location of any recesses on the surface.
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