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Extension of the NIST tristimulus colorimeter for solid-state light source measurements



George P. Eppeldauer, Carl C. Miller, Thomas C. Larason, Yoshihiro Ohno


In order to obtain improved color measurement uncertainties for solid state light (SSL) sources, the second generation tristimulus colorimeter of NIST has been extended with a fifth channel to perform efficient matrix corrections for the spectral mismatch of the realized the channels. It is described how the tristimulus values can be determined using detector-based calibration and matrix corrections. Using modelling, the accuracy of the spectral mismatch corrections from both the detector-based calibration and the matrix corrections is compared.
Proceedings Title
CIE Conference on Light and Lighting
Conference Dates
May 27-29, 2009
Conference Location


colorimetr, matrix correction, responsivity, spectral mismatch, tristimulus


Eppeldauer, G. , Miller, C. , Larason, T. and Ohno, Y. (2009), Extension of the NIST tristimulus colorimeter for solid-state light source measurements, CIE Conference on Light and Lighting, Budapest, -1, [online], (Accessed May 21, 2024)


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Created May 29, 2009, Updated February 19, 2017