C-SAM® has the ability to create images by generating a pulse of ultrasound, which is focused to a pinpoint spot. The pulse is sent into a sample and reflected off of interfaces. The frequency of the pulse and design of the lens are chosen to optimize spot size resolution and depth penetration for each application. In the reflection mode of operation the same transducer is used to send and receive the ultrasonic pulse. Return echoes arrive at different times based upon the depth of the reflecting feature and the velocity of sound in the materials. The operator positions an electronic gate to capture the depth of interest. The amount of ultrasound reflected at the interface is based on the differences in the materials at the interface. The more different the materials the more ultrasound reflected.
