Rigrod W W
Appl Opt. 1971 Jul 1;10(7):1524-31. doi: 10.1364/AO.10.001524.
The variety of optical filter characteristics obtainable with periodic stacks of two dielectric materials having simply commensurate optical thicknesses can be greatly increased when the basic section consists of more than one pair of layers. Although no more difficult to monitor in coating than stacks of two-layer sections, coupled-filter stacks have stopband spectra which differ considerably from those of their components in much the same way as the transmission characteristics of closely coupled resonators differ from those of their component resonators. The utility of periodic coupled-to-idler frequency ratios not filled by simply periodic multilayers; and two which permit the construction by band-nesting of wide band high-reflectance mirrors for near-ir and visible wavelengths, as well as MacNeille-Banning prisms for the uv region, with lower index ratios than previously envisaged.
当基本部分由不止一对层组成时，由具有简单相称光学厚度的两种介电材料的周期性堆叠可获得的光学滤波器特性的种类可以大大增加。尽管在镀膜过程中监测耦合滤波器堆叠并不比双层部分的堆叠更困难，但耦合滤波器堆叠的阻带光谱与它们的组件的阻带光谱有很大不同，其方式与紧密耦合谐振器的传输特性与其组件谐振器的传输特性不同非常相似。周期性耦合到闲频频率比的效用未被简单周期性多层填充；还有两种方法可以通过带嵌套构建用于近红外和可见光波长的宽带高反射镜，以及用于紫外区域的麦克尼尔-班宁棱镜，其折射率比低于先前设想的。
