Abstract
The properties of a dynamic speckle field formed as a result of scattering of a focused laser beam by a flow of a scattering liquid in a capillary, which are the most important from the viewpoint of practical application, were studied experimentally. The dependences of the parameters of the mutual correlation function of the dynamic speckle-field intensities, which are measured at spatially separated points, on the flow velocity and the geometry of the experiment have been established. A new method for measuring the mean absolute velocity in absolute units and direction of a biological liquid flow in microcapillaries on the basis of the results obtained is proposed.
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