Multi-Twist Retarders Technical Details


  • Retardation Bands: fully customizable between 400-4000nm
  • Typical Achromatic Retardation (2TR): 90° ±#° or 180° ±#° for 450-650nm
  • Typical Super-Achromatic Retardation (3TR): 90° ±#° or 180° ±#° for 400-800nm or 500-900nm
  • Typical Precision Retardation: 180° ±#° for 720-880nm
  • Typical Chromatic Retardation: 1.~180° (510-540nm) and ~0° (630-650nm, 445-460nm); or 2.~180° (1-4 µm) and ~0° (500-900nm);
  • Patterned/louvered domains: nearly any pattern, with resolution down to <5 µm
  • Size: up to 300 x 300mm sq; round or arbitrary cut samples are custom


  • Due to their simple fabrication and many degrees of design freedom, MTRs are ideal for:
  • Patterned Retardation (louvers or other patterns)
  • Wide Achromaticity
  • Precision, Low-variation Retardation
  • Single Film, Highly Chromatic Retardation
  • Wide Viewing Angle Retardation

Additional Information

The self-alignment of the birefringent layers enables MTRs to greatly exceed the precision, repeatability, and design flexibility of traditional stacked wave-plates. We enjoy the challenge of tailoring our technology to new applications. If you have a unique optical challenge that doesn’t exactly fit our typical specifications, we encourage you to contact us to explore what is possible.


Can you actually make an optical element that could act one way in one wavelength band, and act very differently at another wavelength band?

Yes. By tuning the different layers of the MTR design we can make a waveplate that has different retardance based on wavelength.
Yes. Our technology can be patterned such that different regions have different orientations. This patterning can be discreet or continuously varying depending on your requirements.

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