Colorimetry evaluation supporting the design of LED projectors for paintings lighting: a case study

Abstract

The article describes metrological experiments performed for the development of a projector with a variables light output emission in terms of quantity and chromaticity. Based on LED light sources, the product is designed to emit light with a variable colour temperature ranging from 2700K to 10000K, depending on the arrangement of the LED, the aperture angle of the lens to and the current supply. It also describes the technique used for choosing the best mix of current to guarantee the value of the desired colour temperature and a high colour rendering index for the resulting light mixture.