Speckle correlation method used to measure object's in-plane velocity

We present a measurement of an object's in-plane velocity in onedirection by the use of the speckle correlation method. Numerical correlationsof speckle patterns recorded periodically during motion of the object underinvestigation give information used to evaluate the object's in-plane velocity.The proposed optical setup uses a detection plane in the image field and enablesone to detect the object's velocity within the interval(10-150) μm ? s-1.Simulation analysis shows a way of controlling the measuring range. Thepresented theory, simulation analysis, and setup are verified through anexperiment of measurement of the velocity profile of an object