Spectral response based calibration method of Tristimulus colorimeters

A new method is described to calibrate tristimulus colorimeters for high ac curacy color measurements Instead of traditional lamp standards, modern, hi gh accuracy detector standards are suggested for calibration. After high ac curacy absolute spectral response determination of the tristimulus receiver s, color (spectral) correction and peak (amplitude) normalization can minim ize uncertainties caused by imperfect realizations of the Commission Intern ationale de l'Eclairage (CIE) color matching functions. As a result of the corrections, stable light sources of different spectral power distributions can be measured with an accuracy dominated by the sub tenths of a percent uncertainty of novel spectral response determinations.