Portable colorimeter and method for characterization of a colored surface

摘要: A portable colorimeter for characterizing the optical properties of a colored surface and in particular containing metallic or pearlescent particles, which employs three multiangular spectrophotometric measurements to derive color constants surface. The is compact integrated unit housing irradiation, detection, control, analysis display means illumination angles, preferably -30°, O°, 65°, one detection angle, 45°, all measured from sample normal. method includes determining tristimulus values low resolution spectral reflectance data using twelve detector elements.