FIELD: measuring equipment.
SUBSTANCE: device to determine the propagation velocity of a surface wave includes a coherent light source for generating at least first and second light spots on the surface. The camera captures at least one unfocused image of at least part of the surface comprising light spots. The unfocused image contains images of objects light spots for light spots in this image of the object light spots have a speckle pattern. The analyzer determines the propagation velocity in accordance with the difference in time between changes in the two speckle patterns.
EFFECT: determining the velocity of propagation based on the spatial analysis of speckle patterns and implement effective remote measurement of pulse wave velocity, for example, in the tissues of the animal or human.
13 cl, 14 dwg
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