A general approach to the design of broadband dielectric multilayer coatings for Fabry-Perot spectroscopy is described, with specific application to the design of coatings for the PEPSIOS spectrometer. Designs are presented for reflectivities of 91.5 ± 1.0% over spectral ranges (λmax/λmin) from 1.3 to 2.0.
J. T. Trauger, "Broadband dielectric mirror coatings for Fabry-Perot spectroscopy," Appl. Opt. 15, 2998-3005 (1976)