| Numéro |
J. Phys. Colloques
Volume 48, Numéro C7, Décembre 1987
1st International Laser M2P Conference
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|---|---|---|
| Page(s) | C7-771 - C7-771 | |
| DOI | https://doi.org/10.1051/jphyscol:19877194 | |
1st International Laser M2P Conference
J. Phys. Colloques 48 (1987) C7-771-C7-771
DOI: 10.1051/jphyscol:19877194
Laboratoire d'Optique Physique, CNRS ER-5, Ecole Supérieure de Physique et Chimie, 10, Rue Vauquelin, F-75231 Paris Cedex 05, France
J. Phys. Colloques 48 (1987) C7-771-C7-771
DOI: 10.1051/jphyscol:19877194
NON DESTRUCTIVE EVALUATION AND THERMAL CHARACTERIZATION BY THE PHOTOTHERMAL BEAM DEFLECTION
F. LEPOUTRE, J.R. ROGER and E. LEGAL LASALLELaboratoire d'Optique Physique, CNRS ER-5, Ecole Supérieure de Physique et Chimie, 10, Rue Vauquelin, F-75231 Paris Cedex 05, France
Abstract
The photothermal methods are known to be a useful tool for thermal characterization of materials. Among all these methods only those for which accurate theoretical models are available allow quantitative measurements. In addition it is often necessary to test locally large samples without any contact. All these conditions are fulfilled by the photothermal beam deflection (mirage effect). Let us recall that this optical method uses a first modulated light beam (pump beam) to heat the sample and a second beam (generally from a small He-Ne laser) which is deflected by the thermal gradient in the vicinity of the sample surface (probe beam).