Focus Solar and Glare Control

How were antique building interiors perceived under daylight illumination affected by the particular light scattering properties of Roman glazing? In a joint effort of Lucerne University of Applied Sciences and Arts, Technische Universität Darmstadt, LVR-LandesMuseum Bonn, and Römisch-Germanisches Zentralmuseum Mainz, the light light scattering properties of fragments of Roman glazing were characterized. The BSDF of the samples was measured in the spectral range of visible light, and compiled into data-driven models for later application in the daylight simulation software Radiance. …

Complex fenestration systems typically comprise co-planar, clear and scattering layers. As there are many ways to combine layers in fenestration systems, a common approach in building simulation is to store optical properties separate for each layer. System properties are then computed employing a fast matrix formalism, often based on a directional basis devised by JH Klems comprising 145 incident and 145 outgoing directions. While this low directional resolution is found sufficient to predict illuminance and solar gains, it is too …

The scanning gonio-photometer for measurements of light scatter could be extended for the project High Resolution Complex Glazing Library BIMSOL supported of the Swiss Federal Office for Energy. A novel sample mount, developed by pab advanced technologies Ltd., Freiburg, allows to switch between two sample positions and a reference measurement to characterize the illuminator. The incident light direction can be automatically configured from the control software. Samples of up to 297mm x 210mm and 1000g weight are supported. The extension …