The priority task of the transport complex has always been to ensure the safety of the transportation process. To solve it, cooperation of scientists and specialists in various fields of activity is required. Non-destructive testing is one of the key methods of monitoring the reliability and safety of rolling stock. There are several methods that allow you to detect defects in material or structures without violating the integrity of the objects under study: 1. Phase-contrast method of optical radiation, which is based on the transformation of the phase difference of optical radiation. 2. The magneto-optical method of optical radiation, which is based on an additional effect on the objects of control of the magnetic field; 3. Holographic interferometry is also widely used in non-destructive testing - detection of material or structural defects without violating the integrity of the objects under study. New types of interferometers on zone plates have appeared for controlling the shape of parts, determining straightness and flatness. Typically, the purpose of such studies is to detect the location and size of cracks, voids, non-adhesives, delamination, inhomogeneities in material properties, etc. In this work, we study garnet-ferrite films, in particular, the domain structures of the Leading Center, which can be considered as a zone plate on the basis of which devices for non-destructive testing are created. © 2023 Author(s).