The theory of particle size assessment via Fraunhofer holograph-ic techniques has been developed by several researchers, (Refs. 1-4). These methods allow determination of size and location within a sample volume of opaque particles ranging from four to several hundred microns in diameter. This paper will present a method of applying these methods to the determination of three-dimensional flow-field velocities.
Thomas G. Russell,
F. M. Shofner,
"Recording Fluid Velocity Fields Holographically", Proc. SPIE 0015, Holography I, (1 January 1968); doi: 10.1117/12.946788; https://doi.org/10.1117/12.946788