Double Retardation Plates
Broad Spectral Bandwidth
Wide Temperature Bandwidth
High Damage Threshold
AR coated and Mounted

Specifications:
Material: Crystal Quartz
Dimension Tolerance: +0.0, -0.2 mm
Wavefront Distortion: <l/8 @ 632.8 nm
Retardation Tolerance: <l/500 (typical)
Wavelength Range: 240-2100 nm
Parallelism: <1 arc second
Surface Quality: 20-10 scratch and dig
AR/AR Coating:R<0.2% at central wavelength