A Design for the Large-Angle and Wide Wavelength Antireflective of Film

The idea of non-uniform film was applied: the multilayer uniform films could be equivalent to a non-uniform film layer so that the non-uniform film system could be converted to the uniform film system and the index of refraction of each layer could be gotten by the equivalent method. The relevant design and reasonable optimization for the film system were conducted through computer so as to get a film system whose transmittance is greater than 95% with the incidence angle within 520-640 and wavelength at 420-670nm.