Radiative properties of glass and coatings

Spectral radiative properties of panel glass and coatings are measured, like transmittance and reflectance. The coating influence on the panel behavior is presented. Material properties like index of refraction and the absorption coefficient are determined. Such determination takes place in the visible and near infrared region of the electromagnetic spectrum. The property determination is performed with transmittances and reflectances measurements in different wavelengths from 400 to 4000 nanometers. Total visible and solar transmittance is calculated, based on these data. The complete experimental set-up, the numerical models, as well as some results are presented and discussed in the paper. As a consequence, the presented properties and model allow calculate total transmittance and reflectance of a specific panel sheet, according to the incident angle and the material thickness.