Numerical Wave Optics Investigation of Optical Scatter from Statistically Rough Surfaces

Abstract

The Bidirectional Reflectance Distribution Function (BRDF) describes optical scatter from rough surfaces. Numerical methods can control incident wavelength and surface features. Utilizing Fourier techniques for propagation to the far field, scatter resulting from Gaussian distributed and correlated surfaces is compared to predictions of physical optics and microfacet BRDF models. For RMS surface heights greater than /2, physical optics models are shown to be consistent with resulting scatter for incident light of wavelength 3m to 5m and scattered angles of 2 rad to 2 rad illuminated at normal incidence, while microfacet models fail to predict scatter width for shorter wavelengths.

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Document Details

Document Type
Technical Report
Publication Date
Mar 02, 2017
Accession Number
AD1055073

Entities

People

  • Ann M. Lanari

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Computational Science
  • Detectors
  • Diffraction
  • Distribution Functions
  • Gaussian Distributions
  • Geometry
  • Governments
  • High Performance Computing
  • Information Science
  • Long-Wavelength Infrared Radiation
  • Measurement
  • Normal Distribution
  • Optical Modulators
  • Optics
  • Refraction
  • United States Government

Fields of Study

  • Physics

Readers

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