An Application of Multi-layer All Dielectric Films

Abstract

High efficiency neutral half-mirrors and prisms are obtained by replacing metallic films of beam-splitting mirrors and prisms with multi-layer all dielectric films. Calculated and observed reflectances and transmittances of beam-splitters thus made and other multi-layer films are given. The calculations were performed by means of Smith chart, the results of which show good agreement with those of the observed in the visible region of spectrum.