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本文列出对于用等光学原度的ZnS和MgF_2镀制的周期多层系统在垂直入射时阻带反射率的计算机计算结果。推导了区别阻带中心反射率的最大和最小值的普遍公式,并且推导出计算高级次反射镜的阻带宽度(作为波长的函数)的一般公式。高级次反射镜的带宽和阻带中心的反射率表示在许多图表中,它们适用于在各种折射率的基片上具有直到18层的系统。四分之一波层的增透膜作特殊情况处理。利用这些图表能够简化激光反射镜的设计过程。当用光学法监控厚度时,这些图表在蒸发的过程中也是有用的。给出一个半反镜作为例子,这用于在阻带中心处的反射率有平直的最小值,以获得在阻带的全部宽度上有几乎不变的反射率。
This paper presents computerized results of stopband reflectance at normal incidence for periodic multilayered systems plated with ZnS and MgF 2 having the same optical power. The general formulas that distinguish the maximum and minimum reflectance at the stopband center are deduced and the general formula for calculating the stopband width (as a function of wavelength) of the high order minor is deduced. The bandwidth of the secondary sub-reflectors and the reflectivity of the stop-band center are shown in many charts and they are suitable for systems with up to 18 layers on substrates of various refractive indices. Quarter-wave AR coatings for special cases. The use of these charts can simplify the laser mirror design process. These charts are also useful during evaporation as the thickness is optically monitored. A half-mirror is given as an example for a flat minimum of reflectivity at the center of the stopband to achieve a nearly constant reflectivity over the full width of the stopband.