We reduce the sidelobes that are present in the bandpass zones of rugate filters, using antireflection coatings to design dichroic rugate filters. Our designs are based on the formalism of equivalent systems that allow us to consider a rugate filter a simple equivalent layer with equivalent optical admittance and equivalent phase thickness functions. Rugate filters with apodization were considered.
© 2006 Optical Society of America
(120.2440) Instrumentation, measurement, and metrology : Filters
(220.1230) Optical design and fabrication : Apodization
(310.0310) Thin films : Thin films
(310.1210) Thin films : Antireflection coatings
(310.6860) Thin films : Thin films, optical properties
Federico Aguayo-Ríos, Francisco Villa-Villa, and Jorge A. Gaspar-Armenta, "Dichroic rugate filters," Appl. Opt. 45, 495-500 (2006)