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Achromatic Waveplate

Unlike standard waveplates,Achromatic Waveplates,AWP,provide a constant phase shift independent of the wavelength of light that is used.This wavelength independence is achieved by using two different crystalline materials to yield quarter- or half-wave retardation over a broad spectral range.The Retardation tolerance of our AWPs is better than λ/100 over the entire wavelength range.The flat response of an AWP is ideal for use with tunable lasers,multiple laser-line systems and other broad spectrum sources

Foctek's AWPs are designed to effectively eliminate the wavelength dependence over a wide spectral range,typically several hundred nanometers.Our AWPs are available for four wavelength ranges:VIS (450-680nm),NIR (700-1000nm),950-1300,1200-1650.The AWPs are air spaced construction in a black anodized aluminum housing.Fast axis is marked on the mount.Custom assemblies,including cemented versions,are available to meet your specific requirements.
Specifications:

Material :Crystal Quartz & MgF2
Parallelism :<1 arc min
Diameter Tolerance :+0.0,-0.1
Surface Quality :40/20 scratch dig
Retardance :λ/2 andλ/4
Retardation Tolerance :<λ/100 over wavelength range
Wavefornt Distortion :λ/8@633nm
AR Coated :Rave<0.8%@450-680 Rave<0.8%@700-1000
:Rave<0.5%@950-1300 Rave<0.5%@1200-1650