Accession Number : ADD012619
Title : Method for Measuring Haze in Transparencies.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC
Personal Author(s) : Task,Harry L ; Genco,Louis V
Report Date : 18 Nov 1986
Pagination or Media Count : 10
Abstract : A method of measuring haze in a transparency includes: the steps of illuminating a transparency to be measured from one side using a semi-collimated light source disposed in a predetermined angular relationship to the transparency; measuring the illumination (E) falling on a surface of the transparency from the one side thereof, then along a predetermined line of measurement through the transparency using a photometer to measure the veiling luminance (L) within the transparency from another side of the transparency opposite to the one side thereof, and finally, calculating the haze index of the transparency by solving H sub i = L/E.
Descriptors : *PATENTS, *PHOTOMETERS, *TRANSPARENCE, *TRANSPARENCIES, INDEXES(RATIOS), COLLIMATORS, MEASUREMENT, HAZE, SIDES, ILLUMINATION, LUMINANCE, SURFACES
Subject Categories : Optical Detection and Detectors
Distribution Statement : APPROVED FOR PUBLIC RELEASE