Error Analysis of Aerosol Extinction Cross Section Measurement due to Forward Scattering and Diffraction

  • Yuan Zhongcai Hefei Electronic Engineering Institute, Hefei
  • Shi Jiaming Hefei Electronic Engineering Institute, Hefei
  • Wang Jiachun Hefei Electronic Engineering Institute, Hefei
  • Xu Bo Hefei Electronic Engineering Institute, Hefei
DOI: https://doi.org/10.14429/dsj.59.1557
Keywords: Effective extinction efficiency, forward scattering, diffraction, optical transmissivity, aerosol, diffraction analysis, error analysis

Abstract

Aerosol is a useful mean in electro-optical defence. The optical transmissivity is usually used to evaluate the performance of the aerosol. However in transmissivity measurement, forward-scattered or diffracted light might reach the detector and would be incorrectly recorded as unscattered and transmitted one, which results in the final optical density rise and experimental extinction cross-section becoming erroneously low. Based on forward scattering and diffraction analysis, the beam efficiency and effective extinction efficiency are introduced to examine the error. The results indicate that large particles and detector increase the error. To minimise the error, the distance between the aerosol and the detector must be large enough, and the detector of small area and small view angle is favourable.

Defence Science Journal, 2009, 59(5), pp.545-548, DOI:http://dx.doi.org/10.14429/dsj.59.1557

Published
2009-09-01
How to Cite
Zhongcai, Y., Jiaming, S., Jiachun, W., & Bo, X. (2009). Error Analysis of Aerosol Extinction Cross Section Measurement due to Forward Scattering and Diffraction. Defence Science Journal, 59(5), 545-548. https://doi.org/10.14429/dsj.59.1557
Issue
Vol 59 No 5
Section
Research Papers
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