Used to convert beams with linear polarization into circular polarization, ULO Optic’s phase retarders are mainly used in metal cutting systems to ensure consistent cut quality in all cutting directions.

ULO Optics manufactures both silicon and copper phase retarders. Silicon phase retarders are available in both ?/8 and ?/4 types (45° and 90° retardation). Copper phase retarders are available as ?/4 type only. They have a higher laser damage threshold than silicon phaser retarders.

  • 90 degree +/- 3degrees (< 1 degree possible on request) phase retardation
  • Typical reflectance > 98.5%
  • Substrates up to 5“ diameter available
  • available mounted in our mirror blocks


ULO Optics is an ISO certified company and quality is at the heart of everything we do.  With a host of industrial affiliations you can rely on ULO to deliver.