Metrological provisions for the method of holographic interferometry in investigations of vibrations of turbodecompressor impellers

At present the most accurate and most widely used method of measuring vibrations in engineering is the method of holographic interferometry. For several reasons, it is very difficult to construct a universal holographic schema (UHS) that would make it possible with one holograph to determine and make a comparative analysis of the vibration amplitudes. It is shown in the present work that construction of the UHS becomes possible when investigating vibrations of objects with properties of symmetry. The chief examples used are the pinpointing of points near which parts of the surface are subjected to maximum displacements due to dynamic forces, and where the vectors of observation and lighting are made to coincide with the displacement vectors in accordance with the discovered regularities of spatial displacements of the investigated set of points