标题： 红外光热频差成像在热厚介质中用于热光学特性表征 显示英文标题

标题： Infrared photothermal heterodyne imaging in thermally thick medium for thermo-optic property characterization

摘要： 测量半透明介质中的温度场需要了解材料的热光性质。虽然目前的技术对于等温薄 films 已经很成熟，但对于需要考虑温度梯度的厚介质仍处于未探索状态。本研究提出通过结合透射率测量和热光建模，将当前的红外异频激光光热成像方法推广到厚介质中，以同时测量半透明介质中的热吸收系数和热反射系数。在本工作中，我们验证了该方法的有效性，并测量了几种材料的热光性质：软聚合物（聚二甲基硅氧烷）和硼浮玻璃。 显示英文摘要

摘要： Measuring temperature fields in semi-transparent media requires the knowledge of material thermo-optic properties. While the current techniques are well established for isothermal thin films, they remain unexplored for thick media where temperature gradients need to be considered. This study proposes to generalize the current methods of infrared heterodyne photothermal imaging to thick media by combining transmittance measurements and thermo-optic modeling to measure simultaneously the thermoabsorbance and thermoreflectance coefficients in semi-transparent media. In this work, we demonstrate the validity of our methodology followed by the measurements of the thermo-optic properties of several materials: soft polymers (polydimethylsiloxane) and borofloat glasses.