The QWP-AS-ZO-515-25.4 from OPTOMAN is a Crystalline Quartz Waveplate that operates at a wavelength of 515 nm. It has a clear aperture above 18 mm and surface quality of 20 - 10. This air-spaced waveplate has a retardance of lambda/4 with a retardance tolerance of ± lambda/300 and retardance order of zero. It has a beam deviation below 10 arcsec and an AR coating with a reflection of 0.2%. This waveplate has a laser-induced damage threshold of greater than 20 J/cm2 (at 1064 nm, 10 ns, 100 Hz) and transmitted wavefront of up to lambda/10 (at 633 nm). It has an engraving of lambda/4 and is available in a black anodized metal mount that measures ∅25.4 mm ± 0.1 mm x 6 mm ± 0.2 mm.
