Abstract
Perfect narrow-band polarizing interference filter (NBPIF) reflects radiation in wide spectral range except radiation of selected wavelength and specified linear polarization. In real systems of NBPIF there are the constructions with feature of narrow-band interference filters and thin-film interference polarizers for the single wavelength. These filters may be designed for different spectral range. Then the different optical materials could be used. NBPIF have been described earlier1-3.