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Applied Optics

Applied Optics


  • Vol. 39, Iss. 36 — Dec. 20, 2000
  • pp: 6713–6724

Unified inversion scheme that uses light scattering for morphological parameters and optical properties of aggregated aerosols

Guocai Shu and Tryfon T. Charalampopoulos  »View Author Affiliations

Applied Optics, Vol. 39, Issue 36, pp. 6713-6724 (2000)

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A robust scheme for characterizing chainlike aggregated aerosols by use of nonintrusive light-scattering measurements is presented. This scheme entails the selection of suitable scattering quantities and their optimal measurement angles; the development of an inversion algorithm to yield the complex refractive index of agglomerates m = n + ik, the primary particle diameter d p , the number of primary particles per agglomerate N p , the number density of agglomerates n A , and the volume fraction of agglomerates f v ; and evaluation of the uncertainties of the inferred parameters that correspond to measuring uncertainties. The data-inversion algorithm is based on the exact formulation of light scattering for agglomerates that consist of primary particles in the Rayleigh limit and therefore has solid theoretical foundations. In addition, this approach yields all the desired parameters of the aggregated aerosols by using in situ light-scattering measurements with a minimum of possible uncertainties. Furthermore, the methodology developed here can be extended to aerosols with other types of morphology and optical property.

© 2000 Optical Society of America

OCIS Codes
(010.1110) Atmospheric and oceanic optics : Aerosols
(010.1120) Atmospheric and oceanic optics : Air pollution monitoring
(010.1310) Atmospheric and oceanic optics : Atmospheric scattering
(290.1090) Scattering : Aerosol and cloud effects
(290.3200) Scattering : Inverse scattering
(290.5820) Scattering : Scattering measurements

Original Manuscript: January 6, 2000
Revised Manuscript: August 28, 2000
Published: December 20, 2000

Guocai Shu and Tryfon T. Charalampopoulos, "Unified inversion scheme that uses light scattering for morphological parameters and optical properties of aggregated aerosols," Appl. Opt. 39, 6713-6724 (2000)

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