UV-Vis-NIR Spectroscopic characterization of glass

Transparent or partially transparent objects, such as glass and stained windows, are usually studied in transmittance mode. This type of measurement can be performed either on small objects, by placing the analysed sample in the sample compartment of a spectrophotometer, or on larger objects by guiding the radiation, on sight, to the investigated object by using fibre optics accessories. In this case the measurement is usually obtained by means of two collinear optical fibres, placed at the opposite sides of the investigated sample. The visible portion of the acquired spectra can be used to calculate the colour coordinates of the analysed object, while the UV-Vis-NIR spectra make it possible to identify the main chromophores.