The schlieren system developed at the Laboratory for industrial and medical ultrasound of Moscow State University for studying the structure of ultrasound fields is described. The results of computer simulation of the process of passing a light beam through the region of spatio-temporal inhomogeneities of the optical refractive index caused by ultrasound are considered. Experimentally obtained shadow patterns are presented under continuous illumination with white light, which are in good agreement with the simulation results.
$^1$Faculty of Physics, Lomonosov Moscow State University
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