European research project RE-VIS, daylighting products with redirecting visual properties

The European RTD project REVIS, Daylighting products with redirecting visual properties (contract JOE3- CT98-0096), started in October 1998 and was completed by the end of 2000. The project was coordinated by TNO. The presentation highlights the objectives, means and some of the main results. The main results are: Measurement data of the full angular (bi-directional) distribution of solar/light radiation transmitted through and reflected in a daylight component (glazing, sun shading), measured in goniophotometer equipment and data analysis software, applied on a number of samples representing novel daylight products. A set of indices on the daylight transmitting quality of glazing and sun shading products in terms of their potential to prevent glare, to redistribute the daylight and to view through as a basis for future European standardisation.