Definition of a spectral mismatch index for spectral power distributions

Alejandro Ferrero (Corresponding author), Alexander Kokka, Tomi Pulli, Tuomas Poikonen, Tobias Schneider, Florian Stuker, Peter Blattner, Alicia Pons, Erkki Ikonen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


To investigate, select and publish an LED reference spectrum to complement the CIE Standard Illuminant A in photometric calibrations, a new technical committee has been recently created by CIE. This technical committee requires defining a spectral mismatch index to quantify the match of spectral power distributions (SPDs) of real sources to the selected reference spectrum. A proposal for such an index is given here, assuming that the spectral mismatch index of the SPD of a real source is directly related to the spectral mismatch systematic error introduced when the photometric quantity is measured using a photometer which is calibrated to a light source with the reference SPD. Finally, the value of this index is discussed and interpreted in photometric terms.
Original languageEnglish
Title of host publicationProceedings of the 29th Session of the CIE
PublisherCIE International Commission on Illumination
ISBN (Electronic)9783902842749
Publication statusPublished - Jun 2019
MoE publication typeA4 Article in a conference publication
Event29th Session of the CIE - Washington, United States
Duration: 17 Jun 201919 Jun 2019


Conference29th Session of the CIE
Country/TerritoryUnited States


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