Optimization of Multiband White-Light Illuminants for Specified Color Temperatures

Snjezana Soltic, Andrew Neil Chalmers
2015 Advances in OptoElectronics  
This paper describes an effective approach for the optimization of multiband spectra to produce prospective white-light spectra having specific color temperatures. The optimization process employs a genetic algorithm known as differential evolution, which aims to minimize the color rendering differences between a prospective white-light spectrum and its corresponding reference illuminant. Color rendering is assessed by calculating the CIEDE2000 color difference (ΔE00) for 14 CIE test colors
more » ... r the two sources. Optimized white-light spectra were matched to three CIE standard illuminants, that is, A (2856 K), D50(5003 K), and D65(6504 K). Optimal solutions for three- and four-band 25 and 50 nm Gaussian spectra are presented and analyzed, together with mixed 4-LED spectra that were optimized in the same way. In all cases, the simulated sources were shown to provide color rendering of such quality that ΔE00av≤ 2.24 units. Such white-light sources would likely find wide acceptance in numerous lighting applications.
doi:10.1155/2015/263791 fatcat:exude5gn5rakrihqi3h34m4rgu