## Measurement of particle-size distribution and volume fraction in concentrated suspensions with photon migration techniques

Applied Optics, Vol. 36, Issue 15, pp. 3310-3318 (1997)

http://dx.doi.org/10.1364/AO.36.003310

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### Abstract

The determination of the particle size distribution and the volume fraction in concentrated suspensions from the multiwavelength measurement of isotropic-scattering coefficients by use of frequency-domain photon migration techniques is demonstrated for three different polydisperse polystyrene suspensions. When a Newton-type inverse algorithm is used, the successful recovery of the particle size distribution, in the form of a Weibull function, and the volume fraction of polystyrene suspensions is achieved. Our results are in excellent agreement with dynamic light-scattering size distribution measurements. On consideration of the particle mass conservation as an additional constraint penalty term in the inverse algorithm, it is shown that the quality of the particle size distribution reconstruction can be improved. Because no calibration is needed, photon migration techniques are especially suited for on-line measurement of the particle size distribution and the volume fraction in the chemical- and the pharmaceutical-based industries.

© 1997 Optical Society of America

**Citation**

Huabei Jiang, Joseph Pierce, Jeffrey Kao, and Eva Sevick-Muraca, "Measurement of particle-size distribution and volume fraction in concentrated suspensions with photon migration techniques," Appl. Opt. **36**, 3310-3318 (1997)

http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-36-15-3310

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