DOI 10.17586/0021-3454-2021-64-1-56-62
UDC 535.241.13
MODELING THE PROCESS OF OBTAINING A STIGMATIC IMAGE OF AN ACOUSTIC OBJECT IN AN ACOUSTO-OPTIC VISUALIZATION DEVICE
Yuri Gagarin State Technical University of Saratov, Department of Physics;
E. L. Nikishin
Yuri Gagarin State Technical University of Saratov, Department of Physics; Associate Professor
M. V. Pavlova
Yuri Gagarin State Technical University of Saratov, Department of Physics; Associate Professor
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Abstract. A method of acousto-optic visualization of spatially inhomogeneous acoustic fields formed by acoustic object is considered. This method is based on Bragg diffraction in a system with a double Fourier transform. Among the advantages of the device that implements this method, there is a high resolution. It is shown analytically that, in contrast to the well-known visualization technique by A. Korpel, the images of acoustic micro-objects obtained with using the proposed a device, are free from astigmatism. As a result of theoretical analysis of the device operation mechanism, equations for calculating the geometric parameters of optical image of acoustic micro-object are derived.
Keywords: visualization, acoustic-optical interaction, Bragg diffraction, acoustic field, stigmatic image, Fourier transform
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