Estimation of particle trajectory effects and their reduction using polarization in phase Doppler particle measurements

Naomichi Yokoi; Yoshihisa Aizu; Hiromichi Mishina

doi:10.1117/1.602238

1 November 1999 Estimation of particle trajectory effects and their reduction using polarization in phase Doppler particle measurements

Naomichi Yokoi, Yoshihisa Aizu, Hiromichi Mishina

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Optical Engineering, Vol. 38, Issue 11, (November 1999). https://doi.org/10.1117/1.602238

Phase Doppler methods that measure the diameter of moving spherical particles are sensitive to particle trajectory effects that cause a phase error under Gaussian beam illumination. This error results from the interference between reflected and refracted rays from the particle. We first numerically estimate the particle trajectory effect using the geometrical optics approximation and the generalized Lorenz-Mie theory (GLMT) and, then, discuss the optimum measurement conditions that minimize the phase error. We next theoretically and experimentally investigate a method for reducing the trajectory effect using the separation of reflected and refracted rays on the basis of the polarization change. Experimental results show the usefulness of this method.

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Naomichi Yokoi, Yoshihisa Aizu, and Hiromichi Mishina "Estimation of particle trajectory effects and their reduction using polarization in phase Doppler particle measurements," Optical Engineering 38(11), (1 November 1999). https://doi.org/10.1117/1.602238

Published: 1 November 1999

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