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COATING THICKNESS MEASUREMENT USING A NEAR INFRARED ABSORBANCE TECHNIQUE AND A LIGHT DIFFUSER
COATING THICKNESS MEASUREMENT USING A NEAR INFRARED ABSORBANCE TECHNIQUE AND A LIGHT DIFFUSER
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机译:使用近红外吸收技术和光扩散器进行涂层厚度测量
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摘要
A system and method for measuring coating thickness upon a substrate is disclosed. A near infrared light is directed upon the coating and reflected near infrared light is collected to determine the coating thickness. A diffuser is placed between the coating and the reflected near infrared light collector to improve the accuracy of the measurement, especially for coating thickness of less than about 2 mils and for coatings with shiny surfaces. The diffuser is formed of a low density polytetrafluoroethylene fluoropolymer film.
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