Polarization rotator
![Wavelength specific half-wave plate showing polarization rotation by 90 degrees.](/Images/godic/202502/03/Waveplate3835.png")
![Broadband prismatic polarization rotator as described by Duarte.[2]](/Images/godic/202502/03/Duarte's_polarization_rotator3836.jpg")
A polarization rotator is an optical device that rotates the polarization axis of a linearly polarized light beam by an angle of choice. These rotators are either based on the principle of birefringence or on total internal reflection.