20 April 2006 A spectrally tunable LED sphere source enables accurate calibration of tristimulus colorimeters
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Proceedings Volume 6158, Lightmetry and Light and Optics in Biomedicine 2004; 61580E (2006); doi: 10.1117/12.675770
Event: Lightmetry and Light and Optics in Biomedicine 2004, 2004, Warsaw, Poland
Abstract
The Four-Color Matrix method (FCM) was developed to improve the accuracy of chromaticity measurements of various display colors. The method is valid for each type of display having similar spectra. To develop the Four-Color correction matrix, spectral measurements of primary red, green, blue, and white colors of a display are needed. Consequently, a calibration facility should be equipped with a number of different displays. This is very inconvenient and expensive. A spectrally tunable light source (STS) that can mimic different display spectral distributions would eliminate the need for maintaining a wide variety of displays and would enable a colorimeter to be calibrated for a number of different displays using the same setup. Simulations show that an STS that can create red, green, blue and white distributions that are close to the real spectral power distribution (SPD) of a display works well with the FCM for the calibration of colorimeters.
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I. Fryc, S. W. Brown, Y. Ohno, "A spectrally tunable LED sphere source enables accurate calibration of tristimulus colorimeters", Proc. SPIE 6158, Lightmetry and Light and Optics in Biomedicine 2004, 61580E (20 April 2006); doi: 10.1117/12.675770; https://doi.org/10.1117/12.675770
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KEYWORDS
Light emitting diodes

Calibration

LCDs

CRTs

LED displays

Light sources

Optimization (mathematics)

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