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Measuring Monodisperse Small Particles En MasseNew optical method enables determination of sizes of approximately-micron-sized particles. Arrays of particles act as diffraction gratings. Simple and inexpensive apparatus replaces high-magnification microscopes in measurements of diameters of small polystyrene latex spheres. Device being used to determine monodispersity and diameters of polystyrene latex microspheres used as seeding material for laser-velocimetry flow measurements in NASA's wind tunnels. Characterization of particle sizes important in wide range of fields, including manufacture of plastics and ceramics, biochemistry, and medicine.
Document ID
19900000657
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Bruce, Robert A.
(NASA Langley Research Center, Hampton, VA.)
Nichols, Cecil E., Jr.
(NASA Langley Research Center, Hampton, VA.)
Date Acquired
August 14, 2013
Publication Date
December 1, 1990
Publication Information
Publication: NASA Tech Briefs
Volume: 14
Issue: 12
ISSN: 0145-319X
Subject Category
Mechanics
Report/Patent Number
LAR-14152
Accession Number
90B10657
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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