The artificial sky has been in operation at the Institute of Constructions and Architecture of Slovak Academy of Sciences in Bratislava since 1970´s. This artificial sky provided daylighting simulations under overcast sky conditions mainly for daylighting measurements in physical scaled models in building interiors and light transmission measurements of building devices. The sky dome is made from reinforced concrete and it is hemispherically shaped with diameter of 8 meters.

     Thanks to support of the APVV grant scheme, the simulation of ISO/CIE general standard skies has carried out in the Institute of Construction of Architecture in Bratislava, therefore a refurbished process of lighting system and dome´s surface was requested. In cooperation with OMS Ltd was installed modern lighting system consisting of LED luminaires providing safe and energy saving illumination of the artificial sky. As a part of renewal process, the special photometric spectrally non-selective coating with high diffuse light reflection was developed and applied in cooperation with company Chemolak, Inc. Smolenice, Slovakia.

     Using computer-controlled system the sky luminance distribution of ISO/CIE standard skies will be calibrated according to ISO 15469:2004(E)/CIE S 011/E:2003. Spatial Distribution of Daylight – CIE Standard General Sky.

     The artificial sky after the renovation will provide complex services in the field of daylight simulation and daylight measurements in real physical models under the reference ISO/CIE conditions.