Colorimetry, chromaticity space, and LEDs

Carolyn F. Jones

doi:10.1117/12.327953

20 October 1998 Colorimetry, chromaticity space, and LEDs

Carolyn F. Jones

Proceedings Volume 3428, Illumination and Source Engineering; (1998) https://doi.org/10.1117/12.327953
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

LEDs are narrow-band emission sources and present special problems in colorimetric characterization. Chromaticity space is mapped using Gaussian spectral models to represent narrow-band emission sources. The Gaussian maps show that the spectral regions are distorted and non-uniform, with a curious `warp' in the yellow. These maps do not resemble the traditional Kelley chart. The Gaussian models are used to understand effects of spectral shape on colorimetric values. The models predict the sensitivity of dominant wavelength to spectral width and spectral peak. The predictions are compared to LED measurement data. The predictions have practical implications for LED colorimetry, including measurement conditions and equipment resolution.

Citation Download Citation

Carolyn F. Jones "Colorimetry, chromaticity space, and LEDs", Proc. SPIE 3428, Illumination and Source Engineering, (20 October 1998); https://doi.org/10.1117/12.327953

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