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Femtoline Polarization Plane Rotators

  • Intended to rotate beam polarization plane strictly to an appropriate angle using the circular birefringent effect
  • Made of crystalline quartz


As compared to waveplate, a rotator has an intrinsic advantage, being independent of rotation around its own optical axis. It needs no adjustment, only to be installed normal to the incident radiation. A polarization plane rotator is normally used for the specific wavelength. It is only slightly dependent on ambient temperature.


Material Single crystal quartz
Optical axis Normal to faces S1, S2 of rotator
Clear aperture Ø 17 mm
Ring mount outer diameter, D 25.4 mm + 0.0/-0.2 mm
Surface quality 20-10 scratch & dig (MIL-PRF-13830B)
Wavefront distortion λ/10@633 nm
Parallelism < 10 arcsec
AR coating R < 0.5%
Laser damage threshold 100 mJ/cm2, 50 fsec pulse, 800 nm typical