IMPLEMENTATION OF THE SPECKLE PHOTOGRAPHY METHOD FOR THE CONTROL OF DIFFUSELY REFLECTING SURFACES OF OBJECTS

The paper considers the implementation of the speckle photography method for monitoring diffusely reflective surfaces of objects. Optical control methods make it possible to obtain highly accurate and reliable information about the objects under study, so the work is promising and relevant. The work sets the task and defines the method and objects of research. The appearance and schematic diagram of the experimental setup are given. The dependences of the projections dx and dу on the X coordinate in the specklogram plane are obtained. It was revealed that the deviation of the displacement from the mean value for d = 5 µm does not exceed 0.1 µm, and for d = 300 µm it is 1.5 µm. Photographs of speckle interference fields at a critical displacement are shown. As a result of the experiment, a comparative analysis of the data showed that when the specklograms are symmetrically illuminated by two light beams, the measurement accuracy increases many times over. A significant result has been obtained, which indicates the competitiveness of domestic holographic photographic materials based on silver halide compared to imported photographic materials.