A method for proving crystalbirefringence is presented. Thepolarization state of monochromatic plane electromagnetic wave is obtained for intermediate category.
给出了一种证明晶体双折射的方法，并求得单色平面电磁波在中级晶体中的偏振态。
2
For the study of birefringence dispersion character of other aeolotropic crystal material, this method can also be applied.
此方法对其它各向异性晶体材料的双折射率色散特性的研究同样适应。
3
This rhomboid shaped crystal of calcium pyrophosphate, which appears bluish-white (weak positive birefringence) by polarized light with red plate.