【摘要】 本文利用光热偏转光谱法理论,建立了泵浦激励下固体材料温度变化的一维温度场模型,用光热偏转光谱法的基本原理求解热传导方程得到了固体中的温度场分布,研究了样品中的光热偏转信号随时间的变化规律。探头了探测光距离对光热偏转光信号的影响。此外,对阶跃光激励下固体材料温度变化与光热偏转光信号的关系进行了初步分析。结果表明,随着探测光离样品表面距离的增加,信号的变化幅度不断下降。这对光热偏转光谱法的无损检测、医药、物理、化学和新材料等领域具有指导意义。更多还原

【Abstract】 In this paper,using theory of the photothermal deflection spectroscopy method,established a one-dimensional temperature field model of the temperature variation in solid materials with the pump beam excitation. Using the basic principle of photothermal deflection spectroscopy method solved the equations of heat conduction and obtaind the distribution of the temperature field in solids. Rule of the photothermal deflection signal in the samples are studied.In addition,analyzed the relationship between the temperature changes of solid material and the corresponding photothermal deflection signals. The results show that along with increasing of distance from the probe beam to the sample surface,rangeability of the signal cotinually decline. It plays important role in the non destructive evaluation( NDT)photothermal deflection spectroscopy,medication,physics,chemistry and new materials field ect.更多还原