Apparatus for generating data for determining a property of a gemstone and methods and computer programs for determining a property of a gemstone
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United States of America Patent
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Jul 3, 2007
Grant Date -
Feb 17, 2005
app pub date -
Aug 19, 2004
filing date -
Dec 13, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
An apparatus for generating data for use in determining a property of a gemstone, such as a cut diamond with a support structure for supporting a gemstone placed at an observation position, the support structure being arranged such that, if the gemstone has an axis of symmetry, the gemstone is supportable such that the axis of symmetry is parallel to an axis X passing through the observation position; an illuminator arranged to illuminate a gemstone so placed with a spatially varied light pattern; a rotator arranged to cause relative rotation between the light pattern and the support structure generally about the axis X; and a camera arranged to capture, at each of a plurality of rotational positions, an image of light returned by the gemstone and to output said images as image data.
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