lowbirefringence
Low birefringence refers to a material property where the refractive index difference between two orthogonal polarization states is very small. This means that light polarized along different directions travels through the material at nearly the same speed. Birefringence, in general, is the optical property in anisotropic materials that causes a single incident ray of light to split into two rays, each traveling at a different speed and with different refractive indices. In low birefringence materials, this splitting effect is minimal.
Materials with low birefringence are desirable in applications where preserving the polarization state of light is