Realization of acoustic resonant microscopy and its application for monitoring the moisture content in an electrolyte film for fuel cell

提出了一种利用声波共振现象评价层状介质声学特性的方法。将待测聚合物薄膜附着在透明玻璃板上，观察通过薄膜产生的声学共振现象，并获取相应区域的光学显微镜图像。声光混合显微技术实现了对钢板涂层厚度波动的可视化和对薄膜热降解的检测。例如，线性低密度聚乙烯薄膜的变化随热处理方法和条件的不同而不同，这种差异可以通过本技术检测到。

A technique for evaluating the acoustic properties of a layered medium utilizing an acoustic resonant phenomenon has been developed. The polymer film to be tested was attached onto the transparent glass plate and the acoustic resonant phenomenon via the film was observed together with acquiring the optical microscope image at the corresponding area. The acoustic-optical hybrid microscopy technique realized to visualize the fluctuation of the coating thickness on a steel plate and to detect the thermal degradation of a film. For example, the changes in the linear low-density polyethylene films were different depending on the methods and conditions for heat treatments and the difference could be detected by the present technique.