Linear optical properties of (Cu2O)x (Al2O3)0.05−x (B2O3)0.20 (PbO)0.75 glasses in the spectral range 200–3300nm

Abstract Glasses of composition (Cu 2 O) x (Al 2 O 3 ) 0.05− x (B 2 O 3 ) 0.20 (PbO) 0.75 , where x = 0.0, 0.005, 0.0075, 0.01, 0.02, 0.035, and 0.05, are prepared using the normal melt quench technique. Reflectance and transmittance at normal incidence are measured by a spectrophotometer in the spectral range of 200–3300 nm. Analytical relations are used to deduce the real and imaginary refractive indices, at each scanned wavelength, from the measured reflectance and transmittance. Dispersive parameters of Wemple–DiDomenico dispersion’s relation, molar refraction and molar polarizability are deduced. Direct and indirect allowed transitions optical energy gaps are calculated from the absorption coefficients. Effects of substituting Al 2 O 3 by Cu 2 O, on these linear optical properties of the prepared glasses are studied. The prepared glasses can be used as near IR filters with 70% transmittance.