Abstract
The last decade has seeen the evolution of particle image velocimetry, often refered to as speckle velocimetry, as a new and powerful technique for obtaining simultaneous measurements of the two in-plane components of fluid velocity at all points on a two-dimensional illuminated "sheet". The sheet is produced by passing the output from a pulsed (or chopped CW) laser through a combination of spherical and cylindrical lenses. The sheet is viewed along a normal so that a sequence of stroboscopic images are obtained of the developing flow. These are recorded either on photographic plate or by video camera for post-experiment image processing.
© 1988 Optical Society of America
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