FIELD: instruments for flaw detection. SUBSTANCE: method involves excitation of magnetic field in tested sample, application of flaw dissipation fields to film, which is made from magnetooptical material, illumination of magnetooptical film by polarized light, passing light beam reflected from magnetooptical material through analyzer, making flaw image, storing image in computer memory for further processing. Analyzer is oriented at right angle with respect to polarization plane of light incident to magnetooptical material. Also, method involves measurement of total amount of light flow passed through light flow analyzer. Displayed pieces of pipeline walls are recorded, only if total signal is greater than threshold value. Selective analysis of flaw images provides possibility to increase efficiency by factor of 10-1000. EFFECT: increased efficiency. 1 dwg
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