Accession Number:

ADA495933

Title:

A Comparative Study of the Bidirectional Reflectance Distribution Function of Several Surfaces as a Mid-wave Infrared Diffuse Reflectance Standard

Descriptive Note:

Master's thesis

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT

Personal Author(s):

Report Date:

2009-03-01

Pagination or Media Count:

198.0

Abstract:

The Bi-Directional Reflectance Distribution Function BRDF has a well defined diffuse measurement standard in the ultraviolet, visible, and near infrared NIR, Spectralontrade name. It is predictable, stable, repeatable, and has low surface variation because it is a bulk scatterer. In the mid-wave IR MWIR and long-wave IR LWIR, there is not such a well-defined standard. There are well-defined directional hemispherical reflectance DHR standards, but the process of integrating BRDF measurements into DHR for the purpose of calibration is problematic, at best. Direct BRDF measurement standards are needed. This study use current calibration techniques to ensure valid measurements and then systematically investigates the BRDF and its variation for eight potential MWIR diffuse BRDF standards. Diffuseness, repeatability, and reflectance are all considered as required parameters necessary for a di use MWIR BRDF standard. This document shows comparatively that Spectralon is an excellent candidate for a diffuse MWIR BRDF standard.

Subject Categories:

  • Statistics and Probability
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE