A commercial spectrophotometer equipped with near normal reflectance, normal transmittance and variable angle transmittance accessories is used for daylight characterisation of some uncoated and coated glasses that are representative of commercial products for architectural purposes. The sample optical paramters (ri, extinction coefficients, thickness of the coating when present) are determined by home-made computer programs from transmittance and reflectance measurements at normal incidence. The reliability of the optical characterisation is checked by comparing the luminous transmittance determined from the experimental spectral transmittance measured at some incidence angles with that determined on the basis of the glazing optical charaterisation. Finally, simple analytical equations are proposed to approximate theluminous parameters.
