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Study on errors of nonsimultaneous polarized-light scattering measurements of suspended rod-shaped particles

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Abstract

In this paper, we analyze the difference between the simultaneous and nonsimultaneous measurements of the polarization states of scattered light from rod-shaped particles suspended in the stirred fluid. We find that nonsimultaneous measurements of the linear degree of polarization introduce a systematic error in the mean value and a significant increase in the random error than the corresponding simultaneous measurements. As the time delay for the nonsimultaneous measurement increases, both the systematic and the random errors first increase, then approach their stable values, after a characteristic time delay. We investigate the influence of the integral time of the measurement, the concentration and the immigration speed of the particles on the errors, and the characteristic time delay. Further analysis shows that both the errors and the characteristic time delay of the nonsimultaneous measurements are directly related to the number of particles in the scattering volume and the number of recorded polarization states from each particle. The characteristic time delay is also related to the kinetics of the particles.

© 2015 Optical Society of America

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