Optical properties of two-layer antireflection systems are discussed. Theory is applied to study the optical performance of bismuth-oxide/magnesium-fluoride bilayers. The theoretical study includes graphs and numerical tables showing the spectral reflectances for different glass substrates, the effect of film-thickness mismatching and the spectral reflectance for plane-polarized incident light.
L. A. CATALÁN, "Some Computed Optical Properties of Antireflection Coatings," J. Opt. Soc. Am. 52, 437-439 (1962)