Two concepts new in square bandpass design make the design process easier and more systematic. One is the use of adjacent high-order rejection bands. The second is the use of effective index ratio. This paper extends the work of L. I. Epstein [ J. Opt. Soc. Am. 42806 ( 1952): “ The Design of Optical Filters”] and A. Thelen [ J. Opt. Soc. Am. 501533 ( 1966): “ Equivalent Layers in Multilayer Filters”].
© 1981 Optical Society of AmericaFull Article | PDF Article