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
Original Manuscript: June 3, 1997
Revised Manuscript: March 30, 1998
Published: July 20, 1998
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)