Key comparison CCPR-K1.a as an interlaboratory comparison of correlated color temperature

P. Karha, A. Vaskuri, T. Pulli, E. Ikonen

Research output: Contribution to journalArticle in a proceedings journalScientificpeer-review

1 Citation (Scopus)


We analyze the results of spectral irradiance key comparison CCPR-K1.a for correlated color temperature (CCT). For four participants out of 13, the uncertainties of CCT, calculated using traditional methods, not accounting for correlations, would be too small. The reason for the failure of traditional uncertainty calculation is spectral correlations, producing systematic deviations of the same sign over certain wavelength regions. The results highlight the importance of accounting for such correlations when calculating uncertainties of spectrally integrated quantities.

Original languageEnglish
Article number012012
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2 Mar 2018
MoE publication typeA4 Article in a conference publication
Event13th International Conference on New Developments and Applications in Optical Radiometry, NEWRAD 2017 - Tokyo, Japan
Duration: 13 Jun 201716 Jun 2017

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