Frequency domain photothermal radiometry with spherical solids
Frequency domain photothermal radiometry with spherical solids
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DOI：
10.1063/1.2721424
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发表时间：
2007-04
影响因子：
3.2
通讯作者：
Chinhua Wang;Yue Liu;A. Mandelis;Jun Shen
中科院分区：
文献类型：
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作者：
Chinhua Wang;Yue Liu;A. Mandelis;Jun Shen
由于光热技术在测量具有曲率的各种形状的材料方面的实际和工业应用的增加，我们将光热诊断的应用扩展到固体球体，其中讨论了球体几何形状和样品热扩散率的理论和实验光热辐射测量研究。基于格林函数法，得到了球形固体的全热波场分布。讨论了材料的热物理性质、固体的直径、入射激光束的大小和测量角度对热波场特性的影响。不同直径钢球的实验结果表明理论与实验结果吻合较好。
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.