摘要
基于光热辐射技术(PTR)中的非线性效应,本文建立了材料中的非线性热传导方程及其相应的边界条件,导出了二次谐波的PTR信号表达式,讨论了二次谐波信号的特点并进行了实验验证。为非线性PTR技术的实际应用提供了理论基础。
Based on the nonlinear effect of photothermal radiometry(PTR), a theoretical model of nonlinear heat conduction along with boundary conditions is developed, from which the representations of the second-harmonic signal of PTR are derived. Furthermore, the general features of the second-harmonic signal are discussed, and all of these are well demonstrated by the experimental results. This nonlinear theory provides a theoretical basis for the applications of the nonlinear PTR technique.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第4期281-286,共6页
Journal of Infrared and Millimeter Waves
基金
国家自然科学基金
关键词
非线性
光热辐射
二次谐波
linear photothermal radiometry, nonlinear photothermal radiometry, second harmonic.
