title: Measurement of beam-shape coefficients in the generalized lorenz-mie theory for the on-axis case.
abstract: The use of the generalized Lorenz-Mie theory that describes the interaction between a spherical particle and an arbitrarily shaped beam requires knowledge of the beam-shape coefficients (BSC's) that describe the illuminating beam. Classically, these BSC's are evaluated from an a priori mathematical description of the illuminating beam. We propose a method that relies on intensity measurements along the beam axis that permits one to measure directly the BSC's of an actual beam in the laboratory.
authors.forename: H
authors.initials: H
authors.lastname: Polaert
authors.forename: G
authors.initials: G
authors.lastname: Gouesbet
authors.forename: G
authors.initials: G
authors.lastname: Gréhan