Low cost high resolution transient thermography imaging based on equivalent wave field transform

Meir Gershenson

doi:10.1117/12.2535445

8 May 2019 Low cost high resolution transient thermography imaging based on equivalent wave field transform

Meir Gershenson

Proceedings Volume 11004, Thermosense: Thermal Infrared Applications XLI; 110040Q (2019) https://doi.org/10.1117/12.2535445
Event: SPIE Defense + Commercial Sensing, 2019, Baltimore, MD, United States

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.

Conference Presentation

Citation Download Citation

Meir Gershenson "Low cost high resolution transient thermography imaging based on equivalent wave field transform", Proc. SPIE 11004, Thermosense: Thermal Infrared Applications XLI, 110040Q (8 May 2019); https://doi.org/10.1117/12.2535445

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