Birefringence is an important optical parameter of nonisotropic crystal , which is determined by multi factors , such as component structure growth condition and wavelength .

• 双折射率是表征各向异性晶体光学特性的一个非常重要的光学参数,由材料的成分结构以及生成条件等多种因素所决定,并且与波长有关。