This paper presents the results of measurements of the spectral characteristics of samples of porous and two-phase glasses in transmitted and reflected light. The spectral ranges in which Rayleigh scattering predominates are determined for samples of porous glasses. Estimates of the absorption coefficient and refractive index are obtained for weakly absorbing and scattering samples. The porosity and the size of the porous structures are estimated in the effective-medium model. Estimates obtained from the Gurevich-Kubelka-Munk formula are used for scattering porous glasses.
© 2008 Optical Society of AmericaPDF Article