Abstract

The optical depth of a settling aerosol is measured as a function of time. An analytic model is fitted to the time record of the optical depth. This allows an inversion of the problem which results in an analytic model for the size distribution of aerosol particles for radii between 1 μ and 10 μ. The model size distribution is verified by comparison with data from a direct microscope count of particle sizes. The model size distribution is then used to calculate the time behavior of forward scattered light. This calculation is compared to experiment to provide further corroboration of the aerosol size distribution.

© 1970 Optical Society of America

Second and Higher Order Scattering of Light in a Settling Polydisperse Aerosol

A. Deepak and A. E. S. Green
Appl. Opt. 9(10) 2362-2371 (1970)

Forward-scatter meter for estimating 10.6-μm aerosol extinction

H. Gerber
Appl. Opt. 26(3) 539-544 (1987)

Point Visibility Meter: a forward scatter instrument for the measurement of aerosol extinction coefficient

J. V. Winstanley and M. J. Adams
Appl. Opt. 14(9) 2151-2157 (1975)

Comparative Studies of Extinction and Backscattering by Aerosols, Fog, and Rain at 10.6 μ and 0.63 μ

D. B. Rensch and R. K. Long
Appl. Opt. 9(7) 1563-1573 (1970)

Extinction-sedimentation inversion technique for measuring size distribution of artificial fogs

Adarsh Deepak and O. H. Vaughan
Appl. Opt. 17(3) 374-378 (1978)