Achromatic waveplates consist of two plates – one made out of MgF² and one out of quartz. The plates can be cemented, optically contacted, or mounted with an air gap, depending on your needs.

By suitably selecting the thickness of the plates, the total phase shift can be kept nearly constant across a large wavelength range, due to the difference in dispersion. Standard wavelength ranges are 465 nm to 610 nm, 700 nm to 1000 nm, or 1200 nm to 1650 nm. Other ranges can be manufactured upon request.

Available as half-wave plate and quarter-wave plate.