Before revision: Axially rotated elements Assume an optical element has its optic axis perpendicular to the surface vector for the plane of incidence and is rotated about this surface vector by angle θ/2 (i.e., the principal plane , through which the optic axis passes, makes angle θ/2 with respect to the plane of polarization of the electric field of the incident TE wave).
After revision: Axially rotated elements Assume an optical element has its optic axis perpendicular to the surface vector for the plane of incidence and is rotated about this surface vector by angle θ/2 (i.e. the principal plane , through which the optic axis passes, makes angle θ/2 with respect to the plane of polarization of the electric field of the incident TE wave).