Polymeric materials that are used in photonic devices gain a strong interest by scientific researchers. To improve their optical properties, there is a need to focus on polymeric nanocomposites. In the present work, pure PVDF and PVDF/ZnO nanocomposite films have been prepared by using a casting method. Acetone is used as the solvent for the polymer. PVDF/ZnO nanocomposites are prepared by mixing ZnO nanoparticles with polyvinylidene fluoride (PVDF) as the polymer matrix. Different contents of ZnO nanoparticles are used as the filler.Analysis of FTIR spectra confirmed the formation α and β phases. The transmittance, absorbance and reflectance spectra are tested. They showed a very low transmittance and a high absorbance in the UV region. The linear absorption and extension coefficients are calculated. They depended on the concentration of ZnO nanoparticles in the nanocomposites. Evaluation of the refractive index is also carried out. SEM and FESEM images of the samples showed that their surfaces are rough.