HELPING THE OTHERS REALIZE THE ADVANTAGES OF 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 decreased portion of the Michel-Levy chart (x-axis) marks the orders of retardation in multiples of somewhere around 550 nanometers. The region involving zero and 550 nanometers is referred to as the very first buy of polarization hues