Band rejection filters with a bandwidth as narrow as <5% that operate in the UV region can be constructed from multiple thin metal films and insulating layers. A physical model is derived to illustrate the dependence of the wavelength of maximum reflectance and rejection bandwidth on the optical constants of metal and dielectrics, on the thickness, and on the number of repetitive layers. This design prevails over conventional dielectric-dielectric coatings because of its development and simplicity in the fabricating process and its applicability to large spectral ranges.
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Sheng et al. (1992) studied this question.
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