为了简化窄带光学滤波器的结构，需要寻求更高折射率的膜层材料。
To reduce the construction size of narrow band pass filter, it is needed to look for the coating materials with high refractive index.
分析了高阈值激光反射膜膜层材料的选择及膜系设计，比较了目前制备高阈值激光反射膜的几种常用方法。
The material choosing and coating designing are discussed in this paper. At the same time, several methods for laser reflective film preparation are compared.
相对于其他的金属材料而言，金属铝的紫外反射率最高，因此金属铝最适合用做制备空芯光纤的金属膜层材料。
Ultraviolet reflectivity of metallic aluminum is the highest versus other metallic material, so metallic aluminum is the optimum material for fabrication hollow-core fiber.
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