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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 21, Iss. 13 — Jul. 1, 1982
  • pp: 2456–2460

Light scattering device for sizing and velocimetry of large droplets utilizing a ring-shaped laser beam

Werner J. Glantschnig, Michael W. Golay, Sow-Hsin Chen, and Fred R. Best  »View Author Affiliations


Applied Optics, Vol. 21, Issue 13, pp. 2456-2460 (1982)
http://dx.doi.org/10.1364/AO.21.002456


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Abstract

A newly developed light scattering device for sizing and velocimetry of large droplets is described. A novel beam shaping technique is employed in conjunction with a laser operating in the circular TEM01 (doughnut) mode as a light source to achieve a ring-shaped source beam. This particular beam geometry allows definition of a sheetlike scattering volume with an approximately constant power density across it resulting in improved sizing and sampling accuracy. The size resolution of the instrument is better than 7%, and the overall sizing accuracy for an input size range of 30 dB (droplets of ∼45–1500 μm in radius) is ∼10%. While the instrument reported in this paper was designed to analyze water droplets entrained in air, it should also be useful in other sizing applications if appropriate modifications are made.

© 1982 Optical Society of America

History
Original Manuscript: February 13, 1982
Published: July 1, 1982

Citation
Werner J. Glantschnig, Michael W. Golay, Sow-Hsin Chen, and Fred R. Best, "Light scattering device for sizing and velocimetry of large droplets utilizing a ring-shaped laser beam," Appl. Opt. 21, 2456-2460 (1982)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-21-13-2456

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