本文介绍了一种利用慢度曲面判断三方晶系晶体纯模轴的方法。
A method of obtaining the pure mode direction of the trigonal system by the slowness surfaces is introduced.
运用折射率椭球分析晶体的弹光效应，给出了三方晶系沿光轴方向的应力与折射率的变化关系。
The relation between the stress along the optical axis of trigonal crystallographic system and the refractive index is established.
运用折射率椭球分析晶体的弹光效应，给出了三方晶系沿光轴方向的应力与折射率的变化关系。
The relation between the stress along the optical axis of trigonal crystallographic system and the refractive index is established.
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