Depolarized Infrared Reflectance from Dry and Wetted Surfaces.

Abstract

Backscattering of the carbon dioxide laser was measured from soil, sand, concrete, asphalt, and military-specified painted metal plates before and after contamination by an infrared-absorbing liquid. Sensitivity of the 9- to 11-micron volume reflectance spectra to the targeted liquid contamination differed significantly between porous and nonporous scattering surfaces, indicating that diffusion of liquid the material bulk, not resonant absorption of the probe laser by the liquid, dictates direct detection sensitivity thresholds. Keywords: Intermediate infrared radiation; Depolarized radiance; Isotropic radiance; Dielectric surface; Light scattering; Infrared detection; Targeted liquid contamination.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1987
Accession Number
ADA188213

Entities

People

  • Arthur H. Carrieri
  • John T. Ditillo
  • Mark S. Schlein

Organizations

  • Edgewood Chemical Biological Center

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Classification
  • Detection
  • Detectors
  • Dielectrics
  • Electromagnetic Scattering
  • Engineering
  • Intermediate Infrared Radiation
  • Lasers
  • Materials
  • Metal Plates
  • Optical Properties
  • Optics
  • Reflectance
  • Scattering
  • Three Dimensional
  • Waveplates

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Optical Physics and Photonics.
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Directed Energy