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。Of course, the increased the thickness or variation in refractive indices, the greater the diploma of retardation between waves. Early observations produced to the mineral calcite indicated that thicker calcite crystals caused larger varia