Vol. 10, Issue 1, pp. 63-74 (1980)

Abstract

Optical reflection methods used in measurements of parameters and visualization of acoustic surface waves (ASW) are presented. The efficiency of the methods is illustrated by the results of ASW parameter measurements in a lithium iodate single crystal of cut z, propagation along the x-axis, phase velocity ν = 2220±11 m/s and ASW amplitude δ = 2.60±0.01 nm. The travelling acoustic wave has been visualized in two ways: by spatial filtering and by using the method of acoustical stroboscopy giving a stationary image of the wavefronts.