Bi-directional transmission properties of Venetian blinds: experimental assessment compared to ray-tracing calculations
An accurate evaluation of daylight distribution through advanced fenestration systems (complex glazing, solar shading systems) requires the knowledge of their Bidirectional light Transmission (Reflection) Distribution Function BT(R)DF. An innovative equipment for the experimental assessment of these bi-directional functions has been developed, based on a digital imaging detection system. An extensive set of BTDF measurements was performed with this goniophotometer on Venetian blinds presenting curved slats with a mirror coating on the upper side.
Keywords: bi-directional transmission distribution function (BTDF) ; goniophotometer ; solar blinds ; simulation model ; ray-tracing calculations ; daylighting ; solar protection systems ; Simulations
Record created on 2010-10-20, modified on 2016-08-08