A.P. Rytik1, V.V. Tuchin2

1,2 Saratov National Research State University n.a. N.G. Chernyshevsky (Saratov, Russia)
2 Institute of Problems of Precision Mechanics and Control, Federal Research Center «Saratov Scientific Center
of the Russian Academy of Sciences» (Saratov, Russia)
1 ra4csz@ya.ru, 1, 2 tuchinvv@mail.ru