Some aspects of application of the speckle interferometry of a single speckle in scientific and applied research

This article presents a study on the application of speckle interferometry single speckle for measurements of dynamic processes in solid mechanics, both in scientific and applied problems. Theoretical study of the proposed method of research the theoretical assessment of its implementation constraints are presents. The optical scheme of the proposed method, which allows to simultaneously record the shapes of natural vibrations and to measure the amplitude of these vibrations, is presented. Theoretical calculations show that the measurement of the amplitude of oscillations is necessary to consider the location of the photodetector.