Fraunhofer Institute for Building Physics
Light and radiation testing facility: Multifunctional integrating sphere
Energy Efficiency and Indoor Climate
| Measured variables | 1. Directional-hemispherical reflective and transmission properties of façade elements and urban surfaces. 2. Luminous fluxes, light output and operating efficiency of lamps and luminaires. |
| Standards | DIN EN 410, DIN EN 14500, DIN EN 14501, DIN EN ISO 52022-3, DIN EN 13032 |
| Test objects |
Slats, different types of glass (e.g. cast glass, glass with multidimensional laser engravings inside), semi-transparent PV modules, urban surfaces, multi-wall sheets, lights, luminous windows |
Technical data
| Light source |
Spotlight array coupled with HMI and halogen spotlight |
| Sensors | Spectroradiometer in a range between 280 nm and 2500 nm |
| Sphere size | Sphere diameter 2 m with two port openings of 600 mm diameter |
| Sample size (L × W × H) |
From 600 mm x 600 mm x 100 mm up to samples with a maximum edge length of 1500 mm, thickness of 250 mm and weight of 300 kg |
Special features
| Automatic sample positioning | Swivel tilt from 0° to 180°, sample rotation from 0° to 360°, slat tilt angle from 0° to 90° |
| Calibration | Sphere factor calibrated with standard lamp |