Patent ID: 8692887
Filing Date: 2014-04-08
Classification: G01B,G01J

Abstract:
1. An apparatus for determining variable thickness of a coating disposed on a substrate, the apparatus comprising: a flash-lamp source capable of generating a thermal pulse at the coating surface; an optical trigger coupled to the flash-lamp source and capable of initiating the flash-lamp firing; a transistor coupled to the flash lamp source and capable of quenching the thermal pulse; a reflective filter positioned between the flash-lamp source and the coating surface capable of preventing residual heat from the flash-lamp from heating the coating surface; an IR image capture device positioned to capture sequential image frames of the coating surface, where each sequential image frame corresponds to an elapsed time and comprises a pixel array, and wherein each pixel of the array corresponds to a location on the coating surface; a processor coupled to the IR image capture device, wherein the processor is programmed to: