New 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.
Measuring Monodisperse Small Particles En Masse
NASA Tech Briefs ; 14 , 12
1990-12-01
Miscellaneous
No indication
English
IuD Bahn | 1994
|Automotive engineering | 2012
|Automotive engineering
|IuD Bahn | 2009
|