Theoretical analysis for the reflection of a focused ultrasonic beam from a fluid-solid interface
نویسنده
چکیده
A theoretical study of the reflection of focused acoustic beams from a fluid-solid interface is presented. The incident field is defined by a Gaussian velocity distribution along a plane emitter. The reflected field is described through its pressure field in a region not restricted to the interface. Nonspecular phenomena were exhibited at any angle of incidence by means of short wave asymptotic analysis. In particular, for incidence near the Rayleigh angle, a distortion of a part of the caustic of the reflected beam including lateral and axial displacements of the focal point is observed.
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