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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 3 — Jan. 20, 2011
  • pp: 379–386

Effect of net surface charge on particle sizing and material recognition by using phase Doppler anemometry

Jun Zhou and Li Xie  »View Author Affiliations

Applied Optics, Vol. 50, Issue 3, pp. 379-386 (2011)

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By taking net surface charge into consideration, the scattering field of particles illuminated by dual laser beams of phase Doppler anemometry (PDA) is computed based on Mie’s theory, and the effect of net surface charge on the phase–diameter relationship and the phase ratio is studied. It is found that the phase–diameter relationship and the relationship between the phase ratio and the refractive index of charged particles could be significantly different from those of uncharged particles, which would lead to errors in particle sizing and the measurement of refractive indices. A method of recognizing charged particles and determining the value of their surface conductivity, which is related to net surface charge, is proposed by utilizing the effect of net surface charge on the measurement of refractive indices using PDA.

© 2011 Optical Society of America

OCIS Codes
(040.1520) Detectors : CCD, charge-coupled device
(000.2658) General : Fundamental tests

ToC Category:

Original Manuscript: August 24, 2010
Revised Manuscript: November 24, 2010
Manuscript Accepted: November 30, 2010
Published: January 19, 2011

Jun Zhou and Li Xie, "Effect of net surface charge on particle sizing and material recognition by using phase Doppler anemometry," Appl. Opt. 50, 379-386 (2011)

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