It indicates that the direction of ray axis and optical axis is identical by discussing the uniaxial crystal at last.
最后对一轴晶进行了讨论，结果表明此时光轴方向与光线轴方向一致。
The relation of ray axis and optical axis is discussed by using the optical wave camber of biaxial crystal.
利用二轴晶的光波面，对光轴与光线轴的关系进行了研究。
We study the beam paths in uniaxial crystal with arbitarily oriented optical axis in general conditions, by it′s plane and ellipsoid of refraction index and Fresnel law.
从菲涅耳定律出发，利用单轴晶的折射率面和光率体，讨论了在一般情况下单轴晶内部的光路问题。
In many instances the thickness of the optical axis direction of crystal as a important physical parameter needs to be confirmed, so it is necessary to accurately measure the crystal thickness.
在许多情况下，需要确定晶体光轴方向厚度这一重要的物理参数，为此就需要精确测量出晶体的厚度。
In many instances the thickness of the optical axis direction of crystal as a important physical parameter needs to be confirmed, so it is necessary to accurately measure the crystal thickness.
在许多情况下，需要确定晶体光轴方向厚度这一重要的物理参数，为此就需要精确测量出晶体的厚度。
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