没有SLAM专栏,只好发在SEM的位置了: The scanning laser acoustic microscope (SLAM) has the capability of determining the spatial distributions of attenuation coefficient and speed in materials under evaluation. The attenuation coefficient is determined by the insertion loss procedure ,which compares the received signal amplitude of a specimen of known thickness in the sound path with that of the reference medium. The entire image is broken into 64 subimage areas, each of approximately 400 uµm × 250 uµm in size.