An apparatus is provided for determining variable thickness of a coating on a surface of a substrate using in part a flash-lamp source, capable of generating a thermal pulse at the coating surface, and a image capture and processing device capable of capture sequential image frames of the coating surface, whereas 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 method of calculating coating thickness is also provided.
https://app.acclaimip.com/pdf/6j9iQRcAOa6WP2Ik8gA5ov25z7jIQ_woe09xPes/US8692887B2
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