Combined daylight systems for lightpipe applications

The European research project ARTHELIO has examined the possibility of guiding daylight into deeper building interiors using hollow light guides. Within this project, a goniophotometer was developed and built up to measure the luminous intensity distribution of lightpipes. In two demonstration sites, the daylight utilisation by the hollow light guides combined with heliostats has successfully been demonstrated. Daylight is collected by heliostats and enters the building. It is guided along hollow light guides and coupled out along its way to illuminate the building interior. Copyright , Manchester University Press.