Abstract

Resonance light scattering (RLS) spectra have been obtained from a liquid suspension of dielectric microspheres a narrow size distribution to find the mean diameter and standard deviation of the size spheres with Comparison with single-particle spectra shows that most peaks in the size-distributed spectra are due to several resonances in the a_n or b_n Mie scattering coefficients. A good estimate of the mean diameter, obtained by matching experimental peak wavelengths with those calculated from Mie scattering formulas, agrees, well with optical microscopy and scanning electron microscopy results. However, the RLS-measured standard deviation of the size distribution is less than half of that from optical microscopy and transmission electron microscopy. Several sources of experimental error which affect the RLS spectra, including scattering angle uncertainty and oversized acceptance aperture, are discussed.

© 1986 Optical Society of America

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