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Proceedings Paper

Low cost high resolution transient thermography imaging based on equivalent wave field transform
Author(s): Meir Gershenson
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Paper Abstract

By using relationships between wave propagation and thermal diffusive propagation, it was shown that that one can transform from diffusive propagation into an equivalent wave field. The transformation results in sharper reflections with time delay proportional to the distance. I have built a low cost system based on IR camera designed as a smartphone add on. I have tested the performance of the system on flat bottom holes both in polycarbonate and carbon composite samples using incandescent quartz halogen light bulb as excitations. The images are as good as or better than any of the common techniques in use. Application of delay and sum back projection was also demonstrated. The combined use of the equivalent wave field transform and delay and sum back projection improves both depth and lateral resolution above any existing methods. The technique is very efficient in term of computational load.

Paper Details

Date Published: 8 May 2019
PDF: 7 pages
Proc. SPIE 11004, Thermosense: Thermal Infrared Applications XLI, 110040Q (8 May 2019); doi: 10.1117/12.2535445
Show Author Affiliations
Meir Gershenson, Consultant (Mexico)

Published in SPIE Proceedings Vol. 11004:
Thermosense: Thermal Infrared Applications XLI
Jaap de Vries; Beate Oswald-Tranta, Editor(s)

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