FIELD: physics.
SUBSTANCE: surface is illuminated with coherent light, digitised and the sequence of its video images is stored. A sample of N readings is formed for each point of the digitised image, containing the time variation of the illumination level and dispersion and mathematical expectation are then calculated for each sample, the ratio of which is then used to image the localisation zones of the surface deformation.
EFFECT: more accurate imaging of deformation localisation zones owing to use of high-resolution video cameras; higher information content of real-time imaging deformation zones and establishment of a direct relationship between measured values and values of rate of deformation in the analysed region.
4 cl
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