FED-STD-373, FEDERAL TEST METHOD STANDARD: INSTRUMENTAL COLOR MEASUREMENTS OF RETROREFLECTIVE MATERIALS AND DEVICES UNDER NIGHTTIME ILLUMINATING AND VIEWING CONDITIONS (01 DEC 1979)

FED-STD-373, FEDERAL TEST METHOD STANDARD: INSTRUMENTAL COLOR MEASUREMENTS OF RETROREFLECTIVE MATERIALS AND DEVICES UNDER NIGHTTIME ILLUMINATING AND VIEWING CONDITIONS (01 DEC 1979)., This standard describes the instrumental determiniation of the chromaticity coordinates of retroreflective materials and devices under conditions that are characteristic of nighttime illuminating and viewing. This guide is intended as a comprehensive guid3e to the geometric and colorimetric terminology useful in characterizing retroreflectors, and as a description of instrument requirements.