Photothermal radiometry with spherical solids
Institute of Modern Optical Technologies, Suzhou University, Suzhou, Jiangsu, 215006, P.R. China
2 Key Lab of Modern Optical Technologies of Jiangsu Province, Suzhou, Jiangsu, 215006, P.R. China
3 Center for Advanced Diffusion Wave Technologies, Department of Mechanical, and Industrial Engineering, University of Toronto, Toronto M5S 3G8, Ontario, Canada
4 National Research Council of Canada, Institute for Fuel Cell Innovation, 4250 Wesbrook Mall, Vancouver, British Columbia, V6T 1W5, Canada
We extend the applications of photothermal diagnostics to solid spheres, in which both theoretical and experimental PTR studies on spherical geometries and thermal diffusivity of the sample are discussed. Based on the Green function method, a full thermal-wave field distribution of a spherical solid is obtained. Experimental results with steel spheres of different diameters exhibit good agreement between the theory and the experiments.
© EDP Sciences, Springer-Verlag, 2008