LITTLE KNOWN FACTS ABOUT BIREFRINGENT CRYSTAL.

各向异性透明晶体如方解石、石英等的折射率，是其固有的特性，称为永久双折射。The polarization dependence on the refractive index might have a range of results, some of which can be hugely critical in nonlinear optics and laser technological innovation:For propagation along the optical axis, the electric discipline