Optically Contacted zero order waveplate is constructed by two quartz plates with their fast axis crossed, the two plates are constructed by optically contacted method, the optical path is epoxy free. The difference in thickness between the two plates determines the retardance. Zero order waveplates offer a substantially lower dependence on temperature and wavelength change than multi-order waveplates.

High Damage Threshold
Better Temperature Bandwidth
Wide Wavelength Bandwidth
Both Sides AR Coated
RoHS Compliant

waveplate
Specifications

Material Crystal Quartz
Dimension Tolerance +0.0/-0.2mm
Wavefront Distortion λ/8@632.8nm
Retardation Tolerance λ/300
Parallelism(single plate) <1 arc second
Surface Quality 20/10 scratch and dig
Clear Aperture >90% central area
Standard Wave quarter-wave(λ/4), half-wave(λ/2)
AR Coating R<0.25%@central wavelength
Damage Threshold >5J/cm2, 20ns, 20Hz @1064nm