Nonpolarizing interference systems containing metallic layers

The structure of nonpolarizing interference systems containing metallic layers is considered. The technique of searching metal-dielectric interference systems, providing a small discrepancy between the spectral characteristics reflection (transmission) for $s$- and $p$- polarizations, is presented. The constructions developed on the basis of the presented method have a rather simple structure that ensures the ease of their implementation. Analysis of the spectral characteristics showed that in the spectral range (460–580) nm, the difference between the integral reflection coefficients for $s$- and $p$- polarizations does not exceed 1%.