Luminous Reflectance Of Glazing Under Diffuse Irradiation

Luminous transmittance and reflectance measurements on glazing can be performed using an integrating sphere with a V(I)-corrected detector. The light source simulating the reference illuminant can be constituted by an illumination system supplying an (almost) parallel beam or a second integrating sphere acting as an emispherical erradiator. Two integrating spheres suitably coupled together are used in this paper to determine luminous reflectance under diffuse irradiation of several glazings from commercial production.