Polarization Plane Rotators

Polarization plane rotators are made of crystalline quartz and rotate the beam polarization plane strictly to a given angle using the circular birefringent effect. Unlike a waveplate, a rotator is independent of rotation around its own optical axis and needs no adjustment, only installation normal to the incident beam. Each rotator is made for a specific wavelength from the UV to the near IR, typically with 45° or 90° rotation, AR coated and mounted in a ring.