The parameters of period and thickness are adjusted so that the first Bragg peak appears at the Brewster angle when the photon energy is in the vicinity of K edge of carbon and L edge of silicon respectively.

• 通过对其相关参数周期数、厚度比以及周期厚度的调整 ,使薄膜的布拉格衍射峰出现在布儒斯特角附近 ,两种多层膜的应用能量范围分别落于C的近K边处和Si的L边前。