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 Multiple Order waveplates(Low Order Waveplate) are made so that the relative phase change is larger than the required value by an integer multiple of 2π. While the performance at the design wavelength can be essentially the same, chromatic dispersion has a stronger effect for thicker plates, so that the optical bandwidth in which the plate has roughly the correct relative phase change is limited. Also, the retardance has a higher temperature sensitivity.
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

Standard wavelength:
266nm, 355nm, 532nm, 632.8nm, 780nm, 808nm, 850nm, 980nm, 1064nm, 1310nm, 1480nm, 1550nm
Half Waveplates P/N#  Quarter Waveplates P/N# Diameter(mm) 
WPL210 WPL410 10
WPL212 WPL412 12.7
WPL215 WPL415 15
WPL220 WPL420 20
WPL225 WPL425 25.4
WPL230 WPL430 30