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.
© 1998 Optical Society of America
Hubert Polaert, Gérard Gouesbet, and Gérard Gréhan, "Measurement of Beam-Shape Coefficients in the Generalized Lorenz-Mie Theory for the On-Axis Case," Appl. Opt. 37, 5005-5013 (1998)