Peculiarities of reconstruction of relief and displacement fields of the surface using the Twyman–Green interferometer

The analysis of surface interferograms obtained using the Twyman–Green interferometer confirms their effectiveness in solving problems in fracture mechanics and solid body deformation. Such interferograms are successfully used to monitor the surface relief of structural material samples, displacement and deformation fields of structural elements made of metals and composites, as well as to detect hidden defects within them. However, solution of each problem requires appropriate adjustments to the optical scheme and design of the interferometer, as well as the use of suitable algorithms for interferogram processing. The recommendations for using the Twyman–Green interferometer to reproduce surface relief and displacement fields, as well as other similar tasks, are presented.