Abstract
Chromaticity measurements of three different types of retroreflective material in six common colors are presented. A computer controlled spectroradiometric retroreflectometer system with sample goniometer was employed for the measurements. Geometry-caused chromaticity changes were as great as 0.05 in x and y. Color differences in both CIELUV and CIELAB computed from a base geometry of α = 0.2 and β = −4° attained values as high as 50 units for some materials. The total color extent of each material is plotted from a 4 × 4 measurement matrix of angles. The paper concludes with the locations of the measured material plotted on the CIE 1931 diagram.
© 1980 Optical Society of America
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