Evaluación de TCC de fuentes LED mediante la reconstrucción de su espectroelectromagnénico empleando un SoC y sensor de 8 canales

Francisco  Espín; Eduardo  Manzano; Carlos  Velásquez

doi:10.26871/killkanatecnica.v7i1.1466

Authors

Francisco Espín Instituto de Investigación Geológico y Energético Universidad Nacional de Tucumán, Departamento de Luminotecnia, Luz y Visión
Eduardo Manzano Departamento de Luminotecnia, Luz y Visión, Facultad de Ciencias Exactas y Tecnología, Universidad Nacional de Tucumán.
Carlos Velásquez Universidad Central del Ecuador, Modalidad en Línea Instituto de Investigación Geológico y Energético Universidad de Alicante, Departamento de Matemática Aplicada

DOI:

https://doi.org/10.26871/killkanatecnica.v7i1.1466

Keywords:

CCT, Electromagnetic Spectrum, Colorimeter, LED, Interpolation

Abstract

The present work presents the implementation of a colorimeter from the 8-channel AS7341 sensor in conjunction with the ESP32 board. With the reading of the eight channels, Hermite's cubic interpolation, cubic segmental interpolation, and Akima interpolation are used to reconstruct the electromagnetic spectrum in a range of 360nm to 830nm with steps of 1nm, for LED sources with correlated color temperature (TCC) declared by the factory of 2700K, 3000K, 4000K, and 5000K. The UPRTEK portable colorimeter is used to compare the results between the measured electromagnetic spectra and those interpolated with each described technique. From the interpolated spectra, the calculation of chromatic coordinates x, y, u, v is performed, and then is obtained the TCC. The results show that the TCC obtained by the different interpolation techniques are within the allowed ranges for 2700K, while for 3000K only two techniques are within the ranges. In the other temperatures, all the techniques are outside the ranges.

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