A road reflectance reference device, corresponding instrument calibration kit and manufacturing method”

Currently, the laboratory instrumentation for the measurement of the luminance coefficient is almost never calibrated. The calibration with these reference materials is a relative method that allows an easier evaluation of the measurement uncertainty and a considerable saving of measurement time, with a reduction of the laboratory costs guaranteeing a higher measurement accuracy, the increase of the reliability of measurements and guarantees traceability. These materials are 3D printed and can also be used for the calibration of instrumentation that measures the BRDF (Bidirectional Reflectance Distribution Function), to minimize uncertainty and optimize the measurement procedures they can be made with the same luminance coefficient values ​​of any table reference.