Indirect Light Collector for Interior Lighting

We propose a passive indirect light collector system for interior lighting with the use of diffuse reflectors. This system is based on the idea that diffuse reflectors may increase the acceptance angle of passive systems therefor improving the overall effectiveness and also achieving a better response to light directionality in certain hours of the day. We search the most efficient way to collect optical power by scaling the collection area with a multi-level configuration. We also analyse the light collection on buildings facades through the simulation of the behaviour of the system under cloudy day conditions showing these systems as a feasible and economic option for indirect and direct light collection for interior lighting, allowing a less invasive way to conduct light to interiors with acceptable efficiency and avoiding the use of heliostats or expensive coating materials.