C2.2 2D-Photothermal Super Resolution with Sparse Matrix Stacking
- SMSI 2021
2021-05-03 - 2021-05-06
- SMSI 2021 - Sensors and Instrumentation
- C2 IRS² Satellite Conference: Thermal Imaging and Thermography
- J. Lecompagnon, S. Ahmadi, P. Hirsch, M. Ziegler - Bundesanstalt für Materialforschung und -prüfung, Berlin (Germany)
- 183 - 184
Thermographic super resolution techniques allow the spatial resolution of defects/inhomogeneities below the classical limit, which is governed by the diffusion properties of thermal wave propagation. In this work, we report on the extension of this approach towards a full frame 2D super resolution technique. The approach is based on a repeated spatially structured heating using high power lasers. In a second post-processing step, several measurements are coherently combined using mathematical optimization and taking advantage of the (joint) sparsity of the defects in the sample.