8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-291-C7-294
Thermal diffusivity determination by the photodeflection method. The influence of wave optical effectsH.-G. Walther1, K.L. Muratikov2 and A.L. Glazov1
1 Friedrich-Schiller-University Jena, Institute for Optics and Quantum Electronics, Max-Wien Platz 1, 07743 Jena, Germany
2 A.F. Ioffe Physicotechnical Institute of the Academy of Sciences of Russia, Politehnicheskaya 26, 194021 St. Petersburg, Russia
Possible approaches to thermal wave based measurement of thermal diffusivity are considered. The calculation of the transverse photodeflection signal in the framework of wave optics prove to be a more accurate approach compared to that of geometrical optics. The influence of the account of wave optical effects on the accuracy of the thermal diffusivity determination is theoretically analyzed under various conditions.
© EDP Sciences 1994