Computer-aided multilayer design of optical filters with wide transmittance bands using SiO(2) and TiO(2).

Starting with the A B C B A multilayer design of Thelen, a computer-aided method is presented to replace the three-material by a two-material design. The method, which utilizes an optimized equivalent layer design, is illustrated by the two commonly used coating materials SiO(2) and TiO(2).