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Applied Optics

Applied Optics


  • Vol. 25, Iss. 5 — Mar. 1, 1986
  • pp: 653–657

In situ particle size measurements using a two-color laser scattering technique

James C. F. Wang and Kenneth R. Hencken  »View Author Affiliations

Applied Optics, Vol. 25, Issue 5, pp. 653-657 (1986)

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We have developed a technique using light scattered from individual particles in the near-forward direction to measure particle size in the range of 10–200 μm. This technique uses the Mie scattering theory to relate the measured light intensity to particle size based on calibration techniques employing pinholes and water droplets of known size. We have applied a unique two-color optical arrangement to minimize the edge effect which can cause incorrect size measurements for particles that pass through the edge of the laser beam focal volume. In this paper we describe our experimental technique and the results of size measurements obtained with this technique for water droplets and pulverized coal particles.

© 1986 Optical Society of America

Original Manuscript: May 17, 1985
Published: March 1, 1986

James C. F. Wang and Kenneth R. Hencken, "In situ particle size measurements using a two-color laser scattering technique," Appl. Opt. 25, 653-657 (1986)

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  1. D. J. Holve, D. A. Tichenor, J. C. F. Wang, D. R. Hardesty, “Design Criteria and Recent Developments of Optical Single Particle Counters for Fossil Fuel Systems,” Opt. Eng. 20, 529 (1981). [CrossRef]
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  7. D. A. Tichenor, R. E. Mitchell, K. R. Hencken, S. Niksa, “Simultaneous In Situ Measurement of the Size, Temperature and Velocity of Particles in a Combustion Environment,” presented at the Twentieth International Symposium on Combustion, U. Michigan, Ann Arbor, 12–17 Aug. (1984).

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