DIRECTIONAL REFLECTANCE AND EMISSIVITY OF AN OPAQUE SURFACE

Abstract

Concepts, terminology, and symbols are presented for specifying and relating directional variations in reflectance and emissivity of an opaque surface element. Their relationship to more familiar concepts, including those of perfectly diffuse and specular reflectance, is given, and they are applied to illustrative examples. It is shown that, when the usual reciprocity relationship holds, the reflectance for a ray incident on an opaque surface element is related by Kirchhoff's Law to the emissivity of that element for a ray emitted along the same line in the opposite sense.

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Document Details

Document Type
Technical Report
Publication Date
May 19, 1964
Accession Number
AD0463473

Entities

People

  • Fred E. Nicodemus

Organizations

  • Sylvania Electric Products

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Detectors
  • Directional
  • Electromagnetic Radiation
  • Equations
  • Geometry
  • Government Procurement
  • Heat Transfer
  • Kirchhoff'S Law
  • New York
  • Optical Phenomena
  • Optics
  • Radiance
  • Radiant Intensity
  • Radiation
  • Reflectance
  • Reflection
  • Scattering

Fields of Study

  • Physics

Readers

  • Theoretical Analysis.
  • Thin Film Deposition Science.
  • Wave Propagation and Nonlinear Chaotic Dynamics.