DESIGN OF 10.4 μm～12.5 μm PASS-BAND OPTICAL FILTER

ne kind of 10.4 μm～12.5 μm pass-band optical fliter,which consists of PbTe and ZnS films,has been designed according to the principle of Herpin refractive index.A simple method of compressing transmssivity ripple has been presented. On the basis of the principle and the method,small transmssivity ripple in pass-band with good optical characteristics has been obtained.