Patent ID: 8319145
Filing Date: 2012-11-27
Classification: B23K,C04B

Abstract:
1. A marking system for marking a gemstone with an energy beam, comprising: an energy beam source configured to produce a spatially dispersed energy beam; a spatial modulator configured to independently modulate a plurality of spatially dispersed portions of the spatially dispersed energy beam to selectively independently irradiate a corresponding plurality of spatially dispersed portions on a surface of the gemstone; and a control, configured to control the spatial modulator to independently modulate the plurality of spatially dispersed portions of the spatially dispersed energy beam directed toward respective spatially dispersed portions of the surface of the gemstone, to form a spatial pattern on the surface of the gemstone; wherein the spatial pattern formed on the surface of the gemstone by the plurality of spatially dispersed portions of the spatially dispersed beam interacts with a material which at least one of: interact with a material deposited on the surface of the gemstone and is selectively spatially modified in accordance with the spatial pattern, and interact with a material for deposition selectively spatially deposited on the surface of the gemstone in accordance with the spatial pattern, to form define a predefined optical diffractive or holographic interference pattern at visible wavelengths.