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Applied Optics

Applied Optics


  • Vol. 23, Iss. 15 — Aug. 1, 1984
  • pp: 2554–2558

Measurements of particle number density using the variable-fringe-spacing laser Doppler velocimeter

K. Tedjojuwono, T. Asakura, and Y. Kawase  »View Author Affiliations

Applied Optics, Vol. 23, Issue 15, pp. 2554-2558 (1984)

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A dual-beam differential-type laser Doppler velocimeter using variable fringe spacing is proposed to measure the number density as well as the velocity of homogeneous monodisperse particles. The main function of the system is to investigate the variation in the visibility of the photodetector signal as a function of the crossing angle of the two beams. A preliminary experimental study was conducted to verify the theory. Good agreement between the theoretical and experimental results was obtained.

© 1984 Optical Society of America

Original Manuscript: January 17, 1984
Published: August 1, 1984

K. Tedjojuwono, T. Asakura, and Y. Kawase, "Measurements of particle number density using the variable-fringe-spacing laser Doppler velocimeter," Appl. Opt. 23, 2554-2558 (1984)

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  1. H. Mishina, T. Asakura, S. Nagai, “A Laser Doppler Microscope,” Opt. Commun. 11, 99 (1974). [CrossRef]
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  6. K. Tedjojuwono, Y. Kawase, T. Asakura, “Effect of Particle Density on the Photodetector Signal of Differential-Type Laser Doppler Velocimetry,” Optik, (1984), in press.

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