Optics: measuring and testing – Crystal or gem examination
Reexamination Certificate
2006-09-01
2008-08-12
Punnoose, Roy M. (Department: 2886)
Optics: measuring and testing
Crystal or gem examination
Reexamination Certificate
active
07411663
ABSTRACT:
An apparatus configured to generate image data for use in determining a property of a gemstone is disclosed. The apparatus includes a support structure configured to support the gemstone at an observation position such that an axis of symmetry of the gemstone is substantially parallel to an axis of rotation of the apparatus, a light source, including a reflector having a concave surface arranged to reflect a spatially varied light pattern generally towards the observation position, the concave surface including at least one relatively reflective region and at least one relatively unreflective region and is configured to generate the light pattern, where the length of a boundary between the relatively reflective region and the relatively unreflective region is greater than the radial distance between the center and an edge of the concave surface, and a rotator configured to rotate the gemstone relative to the light pattern substantially about the axis of rotation.
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Keersmaekers Christiaan Louis Cecile
Van de Velde Marc Frans Alida
Feldman Stephen E.
Feldman Law Group P.C.
Lim Paul
Overseas Diamonds Technologies
Punnoose Roy M.
LandOfFree
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