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 The zero order waveplate is designed to give a retardance of zero full waves, plus the desired fraction. Zero order waveplate shows better performances than multiple order waveplates, it has brod bandwidth and a lower sensitivity to temperature and wavlength changes. It should be considered for more critical applications.
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) 
WPO210 WPO410 10
WPO212 WPO412 12.7
WPO215 WPO415 15
WPO220 WPO420 20
WPO225 WPO425 25.4
WPO230 WPO430 30