What Is The Effect Of Half Wave Plate On Phase Retardation?

What Is The Effect Of Half Wave Plate On Phase Retardation? Two common types of waveplates are the half-wave plate, which shifts the polarization direction of linearly polarized light, and the quarter-wave plate, which converts linearly polarized light into circularly polarized light and vice versa. A quarter-wave plate can be used to produce elliptical polarization