FIELD: optical instrument making. SUBSTANCE: method comprises steps of performing phase change of waves, being registered on a light sensitive medium by coinciding objective fields of two exposures upon displacing of the light sensitive medium in its plane by a value a and at changing an inclination angle of a wave front, being monitored, in a plane of a dull screen by a value α=arcsin a/l,, where l - distance between the dull screen and the light sensitive medium. EFFECT: enhanced responsibility of monitoring process. 1 cl, 1 dwg
