We report for the first time the observation of propagating acoustic waves from constant-overlap and apodized interdigital transducers on y-cut LiNbO3, obtained by a scanning electron microscope using the stroboscopic voltage contrast. It is the most convenient and fastest method known today of observing directly on screen the complex radiation patterns of interdigital transducers on piezoelectric substrates.
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Eberharter et al. (1980) studied this question.
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