本文则利用衍射指标的相关关系，提出确定起始套反射的优化选择方法，并用一个已知结构例进行了验证。
This paper presents an optimal selection method on starting reflexion set on the basis of the relations between the diffraction indexes and give...
菲涅耳透镜的衍射效率是评价菲涅耳透镜质量的一个重要指标。
Diffractive efficiency of Fresnel lens is important factor to evaluate the quality of Fresnel lens.
通常用X射线衍射线的半高宽作为材料表面的强度指标。
In general, the half width of X-ray diffraction is used as a strength index of material surface.
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