2026-04-13T06:57:59Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/869932026-01-21T10:10:55Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Burgos Fernández, Francisco Javier author Vilaseca Ricart, Meritxell author Perales Romero, Esther author Herrera Ramírez, Jorge Alexis author Martínez Verdú, Francisco Miguel author Pujol Ramo, Jaume author 2016-05-06 This study describes a novel spectral LED-based tunable light source used for customized lighting solutions, especially for the reconstruction of CIE (Commission Internationale de l’Éclairage) standard illuminants. The light source comprises 31 spectral bands ranging from 400 to 700 nm, an integrating cube and a control board with a 16-bit resolution. A minimization algorithm to calculate the weighting values for each channel was applied to reproduce illuminants with precision. The differences in spectral fitting and colorimetric parameters showed that the reconstructed spectra were comparable to the standard, especially for the D65, D50, A and E illuminants. Accurate results were also obtained for illuminants with narrow peaks such as fluorescents (F2 and F11) and a high-pressure sodium lamp (HP1). In conclusion, the developed spectral LED-based light source and the minimization algorithm are able to reproduce any CIE standard illuminants with a high spectral and colorimetric accuracy able to advance available custom lighting systems useful in the industry and other fields such as museum lighting. Postprint (published version) Àrees temàtiques de la UPC::Ciències de la visió::Òptica física::Llum Àrees temàtiques de la UPC::Enginyeria electrònica::Components electrònics::Díodes Light emitting diodes Lighting Radiometry solid-state lighting light-emitting diodes CIE standard illuminants minimization algorithm customized lighting design radiometry Llum Díodes Anàlisi espectral Spectrally tunable light source based on light-emitting diodes for custom lighting solutions