Date of Award

3-2017

Document Type

Thesis

Degree Name

Master of Science in Applied Physics

Department

Department of Engineering Physics

First Advisor

Samuel D. Butler, PhD

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 3μm to 5μm and scattered angles of −2 μrad to 2 μrad illuminated at normal incidence, while microfacet models fail to predict scatter width for shorter wavelengths.

AFIT Designator

AFIT-ENP-MS-17-M-099

DTIC Accession Number

AD1055073

Comments

Approved for public release. PA case number 88ABW-2017-2244.

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