Uncertainty Budget for Calibration of Luminance Meters for Measurement of Photopic Adaptation Luminance of Road Tunnels

The present paper represents uncertainty budget for calibration of luminance meters for road tunnels. There are several types of luminance meters calibrations which have different advantages and calibration setups. A description of the configuration for performance of calibrations of luminance meters used in TU Sofia is presented. The specific factors and their contribution in the mathematical model of the combined uncertainty for the used calibration method are observed. The calibration value is valid for the described measurement geometry and the proposed mathematical model. Conclusions are made for the different factors included in the uncertainty budget.