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Updated: Jul 7, 2026

High-speed Particle Image Velocimetry Near Surfaces
Published on: June 24, 2013
Image shifting technique to resolve directional ambiguity in double-pulsed velocity
1University of Illinois, Department of Theoretical & Applied Mechanics, Urbana, Illinois 61801, USA.
Abstract:
Image shifting provides a method of determining the direction of displacement, and hence the velocity, for all types of pulsed laser velocimeter. It is independent of the scattering properties of the particles and/or the intensity of the illumination of the first image with respect to the second image, and it is capable of high performance. With rotating mirror systems, image shifting can be used to offset negative velocities up to 10 m/s. With electrooptic systems, it is estimated that image shifting can be used at velocities up to 500 m/s.
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