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 Dual wavelengths waveplate is a multiple waveplate that provide a specific retardance at two different wavelengths, it's particularly useful when used in conjunction with other polarization sensitive components to separate coaxial laser beams of different wavelength.
Material: Quartz
Diameter Tolerance: +0.0, -0.1mm
Wavefront Distortion : λ/8 @ 632.8nm
Retardation Tolerance: λ/300
Parallelism: <1 arc second
Surface Quality: 20/10
Clear Aperture: >90%
Coating: S1&S2: R<0.2% @ wavelength

P/N#  Diameter(mm)  Phase Retardation 
WPD1212 12.7 λ @1064nm + λ/2 @532nm
WPD1221 12.7 λ/2 @1064nm + λ @532nm
WPD1512 15 λ @1064nm + λ/2 @532nm
WPD1521 15 λ/2 @1064nm +λ @532nm
WPD2012 20 λ @1064nm + λ/2 @532nm
WPD2021 20 λ/2 @1064nm + λ @532nm
WPD2512 25.4 λ @1064nm + λ/2 @532nm
WPD2521 25.4 λ/2 @1064nm + λ @532nm