“…We are considering the task, when the interference pattern created by two laser beams illuminates a flat phase diffraction grating, which can be moved in the transverse direction. This problem represents a special case of the correlation approach (two-stage method) to form an optical field, which has a complex structure and a required distribution of the energy at a technological target [7]. In addition, it can be considered as an extension of the dynamic holography [8,9] to the case where the phase elements, in which a strong link between the distribution of the phase of the grating and the intensity fringes of the interference pattern is broken, are in use.…”