Results and discussion
initially , the wavelength-dependent refractive index ( a dispersion curve) of a glycerol-water mixture was calculated using data from literature and the refractive index data of CaF2 were obtained from reference. The results are graphically shown in Fig 1 In this case, the refractive indices of CaF2 and glycerol-water mixture match at the 294-nm wavelength, where the refractive index of CaF2 is 1.4553