Abstract
The ultrasonic wave was irradiated on the surface of the glass and aluminum alloy specimens at different incident angles, and the back reflection from the surface was obtained. When the ultrasonic wave was irradiated on the mirror finished surface of the glass, the surface reflection profile showed the complex change, and the intensity was decreased with increasing irradiation angle. When the ultrasonic wave was irradiated on the polished surface of the aluminum alloy plate, the reflection intensity was decreased with decreasing surface roughness with slight fluctuation.
