Birefringent Crystal Options
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。If the electrical area has the route of your optical axis, just one obtains the remarkable index ne. This can be done only if the propagation course (much more specifically, the path on the k vector) is perpendicular on the optical axis. F