ABSTRACT
The lighting of objects of art and cultural heritage is one of the area’s most challenging and complex tasks because of the multiplicity of objectives that should be pursued. There is a need to protect and preserve the works of art fulfilling objectives like energy conservation and pollution reduction, meanwhile the exhibition of the art is suitable for the correct visual recognition. The use of Hollow Prismatic Light Guides (HPLGs) offers advantages as the possibility of reducing the risk of damage to materials with the benefit of reduced energy consumption providing good quality and optimal colour reproduction. In this work, we present a compound optical system of HPLGs with a specific elbow to illuminate spaces for a wide range of angular configurations with high efficiency. In addition, a mathematical model is presented to determine transmission efficiency in the optical system. The new approach can be used in both natural and artificial lighting solving architectural and lighting designs restrictions with high colour reproduction.
