提出了冻结的光弹性模型条纹经切削加工后的稳定性的概念。
Thus they advance the concept of stability of the frozen photoelastic model streaks after sliced.
通过试件的旋转或摆动用条纹的移动来反映光束的倾斜，用条纹的稳定性来判断光轴的重合。
When the object is rotating or wiggling, the displacement of Moire fringe indicates the Angle of axis, and the stability of fringe indicates coincidence of the beam axis.
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