Particle Velocity Measurement Using Holographic Methods

P. H. Malyak; B. J. Thompson

doi:10.1117/12.936278

9 January 1984 Particle Velocity Measurement Using Holographic Methods

P. H. Malyak, B. J. Thompson

Proceedings Volume 0427, High Speed Photography, Videography, and Photonics I; (1984) https://doi.org/10.1117/12.936278
Event: 27th Annual Technical Symposium, 1983, San Diego, United States

Abstract

Measuring particle velocities in the Fourier transform plane of double and multiple exposure holograms is discussed. Both in-line far-field and off-axis holograms are considered. If the functional form of the velocity distribution curve is known then the mean and standard deviation can, in some cases, be measured directly from the transform pattern. This procedure is illustrated for a gaussian distribution. Also, a hybrid system for measuring two-dimensional particle velocities is proposed which does not require prior knowledge of the input distribution curve. The system involves sampling the transform plane intensity distribution with a TV camera, digitizing this information and finally, computing the particle velocities. Computer simulations and an actual system output are presented.

Citation Download Citation

P. H. Malyak and B. J. Thompson "Particle Velocity Measurement Using Holographic Methods", Proc. SPIE 0427, High Speed Photography, Videography, and Photonics I, (9 January 1984); https://doi.org/10.1117/12.936278

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