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High-speed Particle Image Velocimetry Near Surfaces
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Holographic particle velocity measurement in the Fraunhofer plane
Applied Optics
|March 9, 2010
Abstract:
Double exposure holograms of a moving particle field having a 1-D velocity distribution are produced. The Fraunhofer plane is observed on reconstruction, and it is shown that for a Gaussian velocity distribution, the fringes which modulate the diffraction pattern have spacings characteristic of the peak velocity. Known and measured peak velocities are compared, and the effect of the velocity distribution width on the fringe contrast is demonstrated.
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