Relations among Kubelka-Munk Coefficients and Absorption and Scattering Coefficients of Powders.

Abstract

The use of the Kubelka-Munk (KM) theory to predict absorption and scattering coefficents of powders from values of diffuse reflectance of an incident radiation beam is shown to lead to errors of 20% or less, for realistic model powders. The use of a conventional plausible relation to predict imaginary refractive index from absorption coefficient is found to produce errors of the order of 200%. Methods for correcting these errors are discussed. A new radiative transfer equation is derived and analyzed for applications to close-packed strongly absorbing or strongly reflecting media. For such media, the new equation predicts reflectances and transmittances which are significantly different from those predicted by the standard transfer equations. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Apr 20, 1977
Accession Number
ADA041110

Entities

People

  • G. H. Goedecke
  • Md Tanvir Rahman

Organizations

  • New Mexico State University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption Coefficients
  • Coefficients
  • Computational Science
  • Computers
  • Difference Equations
  • Differential Equations
  • Equations
  • Far Field
  • Near Field
  • New York
  • Optics
  • Photonic Metamaterials
  • Plastic Explosives
  • Radiative Transfer
  • Refractive Index
  • Scattering
  • Standards

Fields of Study

  • Physics

Readers

  • Calculus or Mathematical Analysis
  • Computational Modeling and Simulation
  • Optical Physics and Photonics.