C5.1 Using spatial and temporal shaping for laser-induced diffuse thermal wave fields in thermography

Event
SMSI 2020
-
(did not take place because of Covid-19 virus pandemic)
Band
SMSI 2020 - Sensors and Instrumentation
Chapter
C5 Thermometry and Thermal Imaging
Author(s)
S. Ahmadi, M. Ziegler, P. Hirsch, J. Lecompagnon, C. Hassenstein, E. Thiel, N. Pech-May - Bundesanstalt für Materialforschung und -prüfung, Berlin (Germany)
Pages
179 - 180
DOI
10.5162/SMSI2020/C5.1
ISBN
978-3-9819376-2-6
Price
free

Abstract

The diffuse nature of thermal waves is a fun-damental limitation in thermographic nonde-structive testing. In our studies we investigated different approaches by shaping the thermal wave fields which result from heating. We have used high-power laser sources to heat metallic samples. Using these spatial and temporal shaping techniques leads to a higher detection sensitivity in our measurements with the infra-red camera. In this contribution we show our implementation of shaping laser-induced diffuse thermal wave fields and the effect on the defect reconstruction quality.

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