In this work, Ta2O5 and TiO2 anisotropic thin films are fabricated by using advanced bideposition technology. By changing asymmetric deposition angle, the film with a tilted bideposition columnar structure exhibits enhanced birefringence for light incident normally. Moreover, the film is arranged in prism/anisotropic thin prism coupling system and the polarization conversion reflectance is measured over the critical angle under total reflection condition. High conversion efficiency (above 60%) remains in a wide range of incident angle.