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。Likewise, the polarization condition of a laser beam in the laser crystal with thermally induced birefringence is distorted. The type of distortion is determined by the posture, Considering that the birefringent axis provides a various (e.