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Response characteristics of laser diffraction particle size analyzers - Optical sample volume extent and lens effectsThe response characteristics of laser diffraction particle sizing instruments were studied theoretically and experimentally. In particular, the extent of optical sample volume and the effects of receiving lens properties were investigated in detail. The experimental work was performed with a particle size analyzer using a calibration reticle containing a two-dimensional array of opaque circular disks on a glass substrate. The calibration slide simulated the forward-scattering characteristics of a Rosin-Rammler droplet size distribution. The reticle was analyzed with collection lenses of 63 mm, 100 mm, and 300 mm focal lengths using scattering inversion software that determined best-fit Rosin-Rammler size distribution parameters. The data differed from the predicted response for the reticle by about 10 percent. A set of calibration factor for the detector elements was determined that corrected for the nonideal response of the instrument. The response of the instrument was also measured as a function of reticle position, and the results confirmed a theoretical optical sample volume model presented here.
Document ID
19850027886
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hirleman, E. D.
(Arizona State University Tempe, AZ, United States)
Oechsle, V.
(Arizona State Univ. Tempe, AZ, United States)
Chigier, N. A.
(Carnegie-Mellon University Pittsburgh, PA, United States)
Date Acquired
August 12, 2013
Publication Date
October 1, 1984
Publication Information
Publication: Optical Engineering
Volume: 23
ISSN: 0091-3286
Subject Category
Instrumentation And Photography
Accession Number
85A10037
Distribution Limits
Public
Copyright
Other

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