Crystal quartz plate with optical axis perpendicular to surfaces can rotate the plane of polarization of an input beam of light. The rotation angle at a particular wavelength is a function of thickness of crystal quartz. With particular thickness the quartz plates can rotate the plane of polarization of incident linearly polarized single wavelength of light by 45 or 90 degrees.

General Specifications

Material                               Quartz
Dimension tolerance         ±0.1mm
Parallelism                          10 arc sec
Surface quality                   20-10 S/D
Wavefront distortion         λ/4@632.8nm
Retardation tolerance      <5 arcmin
Clear aperture                    >90%
Coating on both sides       R<0.25% @ design wavelength