THE SMART TRICK OF BIREFRINGENT CRYSTAL THAT NOBODY IS DISCUSSING

Any time a beam is refracted in the surface area of a birefringent crystal, the refraction angle depends on the polarization route. An unpolarized mild beam can then be break up into two linearly polarized beams when hitting surfaces of the material with non-usual incidence (double refraction).The polarization dependence from the refractive index c