INVERSION FOR MULTI-PARAMETER DEPTH-PROFILES: THERMAL CONDUCTIVITY AND THERMAL IMPEDANCE

摘要

In this article, the iterative method for reconstruction of thermal conductivity and thermal impedance profiles simultaneously from photoacoustic or photothermal measurement has been developed. Many numerical simulations of inversions for different shapes of thermal conductivity and thermal impedance profiles have been done, which indicate that the iteration procedure is convergent and the algorithm is insensitive to random noise. If the initial distribution does not deviate from the original one too much, a good agreement between the reconstructed and original profiles can be easily obtained. Although the reconstruction is strongly dependent on the choice of the initial profiles, the reconstructed thermal effusivity profiles are always in good agreement with the originals. More details about the effectiveness of the present algorithm will be reported elsewhere.