NIOSHTIC-2 Publications Search
Three-wavelength light transmission technique to measure smoke particle size and concentration.
Cashdollar KL; Lee CK; Singer JM
Appl Opt 1979 Jun; 18(11):1763-1769
This paper describes an optical technique and instrumentation for measuring the average particle size and mass concentration of smoke. Transmission through the smoke at three wavelengths is measured using a white light source and a compact, three-wavelength detector assembly. Sizes and concentrations are then calculated from the transmission data using mie theory. Graphs of the calculated mie extinction coefficients are presented for several complex refractive indices. This three-wavelength optical technique was used to study smoke from a wood-tunnel fire, and the results are compared with those of other sizing techniques.
Smoke-inhalation; Particle-counters; Light-properties; Light-waves; Wood-dusts; Optical-analysis; Optics
OP; Journal Article
Issue of Publication
Page last reviewed: December 17, 2021Content source: National Institute for Occupational Safety and Health Education and Information Division