Frequency domain photothermal radiometry with spherical solids
- Institute of Modern Optical Technologies, Suzhou University, Suzhou, Jiangsu 215006 (China)
Motivated by increasing practical and industrial applications of photothermal techniques in the measurement of materials of various shapes with curvature, we extend the applications of photothermal diagnostics to solid spheres, in which both theoretical and experimental photothermal radiometry 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. The characteristics of the thermal-wave field with respect to thermophysical properties of the material, the diameter of the solid, the size of the incident laser beam, and the measurement angle are discussed. Experimental results with steel spheres of different diameters exhibit good agreement between the theory and the experiments.
- OSTI ID:
- 20982820
- Journal Information:
- Journal of Applied Physics, Vol. 101, Issue 8; Other Information: DOI: 10.1063/1.2721424; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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