The influence of small losses in layers of thin-layer interference filters (containing two layers of the same thickness in the period) on their optical parameters was analyzed. Analytical expressions were obtained that help determine possible refractive indices of the medium to be matched and the wavelengths of matching as dependent on the losses. With a large number of periods of the filters, these parameters were shown to be independent of the number of periods and be determined only by the magnitude of specific losses.
Department of Radiophysics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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