Accession Number : AD0760216

Title :   Determination of Absorption and Scattering Coefficients for Nonhomogeneous Media: I. Theory.

Descriptive Note : Research rept.,

Corporate Author : GRUMMAN AEROSPACE CORP BETHPAGE N Y RESEARCH DEPT

Personal Author(s) : Reichman,J.

Report Date : APR 1973

Pagination or Media Count : 26

Abstract : Equations are derived to determine the diffuse reflectance and transmittance of inhomogeneous materials. The equations are valid for collimated incident radiation for any angle of incidence. The effects of boundary reflectance and anisotropic scattering are included. The equations are derived from the equation of radiative transport, using the Schuster-Schwartzchild approximation. They are sufficiently simple to be used for spectroscopic determination of absorption and scattering coefficients. Numerical comparison with more exact solutions of the equation of radiative transfer show very good agreement for all cases except for reflectance in the highly anisotropic case where agreement is only fair. (Modified author abstract)

Descriptors :   (*LIGHT TRANSMISSION, ABSORPTION SPECTRA), REFLECTION, REFRACTIVE INDEX, ALBEDO, INTEGRAL EQUATIONS, NUMERICAL INTEGRATION

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE