title: Counting and classifying small objects by far-field light scattering.
abstract: An approach to small particle counting and classification is proposed in which the size and shape distribution is determined from the far-field pattern of light scattered by the particles. By presuming that the scattering function for each particle species is known from auxiliary experiments or calculations, a general result applicable to irregular particles as well as simply shaped particles is obtained. Inversion formulas, by which the particle distribution is determined from the far-field data, are presented in forms suitable for digital or optical processing. An experimental approach to the design of a real-time optical counting and classifying instrument is suggested.
authors.forename: W L
authors.initials: WL
authors.lastname: Anderson
authors.forename: R E
authors.initials: RE
authors.lastname: Beissner