Practical limitations associated with the use of small probe volumes with respect to the droplet size that is being measured by the phase-Doppler interferometry technique are discussed. An intensity-validation scheme and corresponding probe volume correction factor have been developed that reject trajectory errors and account for the rejections in calculation of the probe cross-sectional area. The intensity-validation scheme also provides a tractable method of setting the photomultiplier tube gain and laser power. Volume flux measurements in dilute sprays have shown a significant improvement over those made by standard phase-Doppler interferometry techniques at small beam waist/droplet size ratios.
© 2000 Optical Society of America
[Optical Society of America ]
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
Peter A. Strakey, Douglas G. Talley, Subra V. Sankar, and Will D. Bachalo, "Phase-Doppler Interferometry with Probe-to-Droplet Size Ratios Less Than Unity. II. Application of the Technique," Appl. Opt. 39, 3887-3893 (2000)