title: Feasibility of using glory and speckle patterns for sizing spherical and irregular particles.
abstract: A backscattered laser light technique for sizing spherical and irregular particles is investigated in this paper. Two different interference patterns (glory and speckle), appearing in the backscatter region when a single droplet is illuminated with a laser light source, were recorded by a CCD camera. A theoretical model, based on a geometrical optics approximation, has been first developed to retrieve particle size from the analysis of these patterns and then applied to liquid and frozen water droplets with sizes ranging from 1 to 2 mm. The satisfactory agreement obtained between the theoretical model and the experimental data encourage further development of this technique.
authors.forename: Sara González
authors.initials: SG
authors.lastname: Ruiz
authors.forename: Maria Rosaria
authors.initials: MR
authors.lastname: Vetrano
authors.forename: Jeroen
authors.initials: J
authors.lastname: van Beeck