Abstract

A holographic image analysis system has been developed to measure position, velocity, size, and shape of microscopic particles settling in 3-D space. Images of particles recorded sequentially on individual holographic frames are reconstructed using an in-line far-field configuration, registered in 3-D space, and particle displacements (velocities) between sequential frames are determined. Particle settling velocity is calculated using elapsed time between frames. Digitized video signals of the reconstructed holographic images are processed to determine particle size, shape, and area to facilitate identification by shape from frame to frame and to calculate particle specific gravities. A cataloging system was developed to provide efficient data management.

© 1984 Optical Society of America

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