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Thickness determination of wet coatings using self-calibration method

 
: Weber, Stefan; Ellrich, Frank; Paustian, Stephan; Güttler, Nico; Tiedje, Oliver; Jonuscheit, Joachim; Freymann, Georg von

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Institute of Electrical and Electronics Engineers -IEEE-; IEEE Microwave Theory and Techniques Society:
42nd International Conference on Infrared, Millimeter, and Terahertz Waves 2017 : Cancun, Quintana Roo, Mexico, August 27-September 1, 2017
Piscataway, NJ: IEEE, 2017
ISBN: 978-1-5090-6050-4
ISBN: 978-1-5090-6048-1
ISBN: 978-1-5090-6049-8
ISBN: 978-1-5090-6051-1
2 pp.
International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) <42, 2017, Cancun>
English
Conference Paper
Fraunhofer IPA ()
Fraunhofer ITWM ()
Lackiertechnik; Oberflächentechnik; Messtechnik; Schichtdicke

Abstract
Terahertz measurement techniques reveal a high potential for non-destructive and contactless thickness determination of thin-coated plastics, ceramics, paper and tablets as well as painted car bodies. While for these applications the thickness is measured at the end of the complete coating process, we here investigate the suitability of this technique in order to determinate the thickness immediately after application of the wet paint. With a self-calibration algorithm, we are able to determine not only the thickness but also the refractive index and extinction coefficient of the coating in wet state simultaneously.

: http://publica.fraunhofer.de/documents/N-480171.html