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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 23 — Aug. 10, 2006
  • pp: 6022–6029

Size distribution of mineral aerosol: using light-scattering models in laser particle sizing

Ben Veihelmann, Martin Konert, and Wim J. van der Zande  »View Author Affiliations

Applied Optics, Vol. 45, Issue 23, pp. 6022-6029 (2006)

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The size distribution of semitransparent irregularly shaped mineral dust aerosol samples is determined using a commonly used laser particle-sizing technique. The size distribution is derived from intensity measurements of singly scattered light at various scattering angles close to the forward-scattering direction at a wavelength of 632.8   nm . We analyze the results based on various light-scattering models including diffraction theory, Mie calculations for spheres with various refractive indices, and T-matrix calculations for spheroidal particles. We identify systematic errors of the retrieved size distribution when the semitransparent and nonspherical properties of the particles are neglected. Synthetic light-scattering data for a variety of parameterized size distributions of spheres and spheroids are used to investigate the effect of simplifying assumptions made when the diffraction model or Mie theory is applied in the retrieval.

© 2006 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.1100) Atmospheric and oceanic optics : Aerosol detection
(010.1110) Atmospheric and oceanic optics : Aerosols
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
(290.0290) Scattering : Scattering

Original Manuscript: January 9, 2006
Revised Manuscript: March 14, 2006
Manuscript Accepted: March 14, 2006

Ben Veihelmann, Martin Konert, and Wim J. van der Zande, "Size distribution of mineral aerosol: using light-scattering models in laser particle sizing," Appl. Opt. 45, 6022-6029 (2006)

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