Exact calculation of light scattering from a particle on a mirror

Bernard R. Johnson

doi:10.1117/12.140753

18 December 1992 Exact calculation of light scattering from a particle on a mirror

Bernard R. Johnson

Author Affiliations +

Proceedings Volume 1754, Optical System Contamination: Effects, Measurement, Control III; (1992) https://doi.org/10.1117/12.140753
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

Exact methods have been developed for calculating light scattering from particles on a perfectly reflecting surface. The computed solutions obey Maxwell's equations and the appropriate boundary conditions. A brief discussion of the theory is followed by a presentation and discussion of selected scattering results. Comparisons are made with the predictions of Young's forward scatter Mie theory model. Under certain conditions, the exact results differ significantly from Mie theory. The exact differential cross sections exhibit large amplitude oscillations that are not predicted by Mie theory. The bidirectional reflectance distribution function (BRDF) is also calculated using exact scattering theory for both spherical and hemispherical particles that are both absorptive (complex index of refraction) and nonabsorptive (real index of refraction). These exact BRDF results are compared to the predictions of Young's model.

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Bernard R. Johnson "Exact calculation of light scattering from a particle on a mirror", Proc. SPIE 1754, Optical System Contamination: Effects, Measurement, Control III, (18 December 1992); https://doi.org/10.1117/12.140753

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