Multiple-scattering corrections to the Beer-Lambert law
The effect of multiple scattering on the validity of the Beer-Lambert law is discussed for a wide range of particle-size parameters and optical depths. To predict the amount of received radiant power, appropriate correction terms are introduced. For particles larger than or comparable to the wavelength of radiation, the small-angle approximation is adequate; whereas for small densely packed particles, the diffusion theory is advantageously employed. These two approaches are used in the context of the problem of laser-beam propagation in a dense aerosol medium. In addition, preliminary results obtained by using a two-dimensional finite-element discrete-ordinates transport code are described. Multiple-scattering effects for laser propagation in fog, cloud, rain, and aerosol cloud are modeled.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6422373
- Report Number(s):
- LA-UR-83-512; CONF-830420-1; ON: DE83007564
- Resource Relation:
- Conference: Society of Photo-Optical Instrumentation Engineers conference, Arlington, VA, USA, 4 Apr 1983; Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Application of the 2-D discrete-ordinates method to multiple scattering of laser radiation
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Related Subjects
GENERAL PHYSICS
EARTH ATMOSPHERE
WAVE PROPAGATION
LASER RADIATION
MULTIPLE SCATTERING
AEROSOLS
ATTENUATION
CLOUDS
DISCRETE ORDINATE METHOD
FINITE ELEMENT METHOD
FOG
LAMBERT LAW
LIGHT SCATTERING
RADIATION TRANSPORT
RAIN
SMOKES
TRANSPORT THEORY
ATMOSPHERIC PRECIPITATIONS
COLLOIDS
DISPERSIONS
ELECTROMAGNETIC RADIATION
NUMERICAL SOLUTION
RADIATIONS
RESIDUES
SCATTERING
SOLS
657007* - Electricity & Magnetism- (-1987)