Probing of pyroelectric distributions from thermal wave and thermal pulse measurements

Abstract

Recently a method for the evaluation of pyroelectric profiles from thermal wave measurements has been introduced, which is based on the construction of a scanning function from the measured pyroelectric spectra. This procedure is extended for the application to thermal pulse data. Well adapted to the propagation behaviour of thermal waves, the scanning function algorithm avoids problems with oscillations and instabilities and delivers an approximated polarization distribution in a very simple and direct way. An on-line analysis of thermal data is possible, giving access to a thermal recording of dynamic processes. The mathematical procedure and its physical basis are given together with numerical and experimental examples.