Wide-range and accurate particle sizing using extended interferometric particle imaging technique.

Abstract

Accurate measurement of particles of a wide size range is generally difficult in interferometric particle imaging (IPI). We propose an extended IPI technique with double or multiple imaging systems of different scattering angles and polarizations to achieve a wider measurable size range. The effects of particle size, scattering angle, polarization, and the comprehensive parameters of the imaging system on fringe patterns are thoroughly discussed. In the case of measuring water droplets, the measurable size range of the extended IPI enlarges to 10 μm-1 mm, with high-quality fringe patterns favoring the accuracy of measurement. The relative deviations of extracted diameters are no greater than 9%, demonstrating good accuracy of the particle sizing using the extended IPI technique.