Accession Number : ADA132511
Title : Certificate of Approval.
Descriptive Note : Master's thesis,
Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
Personal Author(s) : Grogan,George C
PDF Url : ADA132511
Report Date : Jun 1983
Pagination or Media Count : 106
Abstract : A study was made of the variation in the reflectance of a concrete sample as the sun-object-image angular relationship was varied. The research work was performed in the controlled conditions of a laboratory so that atmospheric effects could be neglected. Reflectance measurements were taken from a concrete sample whose surface roughness had been measured. Both specular and diffuse illumination in the red (630 - 680nm) wavelength region of the visible spectrum were measured. A model which can be used to predict the reflectance value for a given sun-object-image angular relationship was developed. Actual reflectance measurements taken outdoors agreed to within one percent of the model's predicted reflectance values.
Descriptors : *Reflectance, Concrete, Surface roughness, Light, Red(Color), Sun, Optical images, Angles, Mathematical prediction, Mathematical models, Theses
Subject Categories : Printing and Graphic Arts
Distribution Statement : APPROVED FOR PUBLIC RELEASE