Achromatic Waveplates
Achromatic Waveplates are made from two different birefringent quartz plates with a fast axis quartz plate aligning with a slow axis of magnesium fluoride. This allows a retardation value to be achieved across the range of wavelengths targeted.
Simtrum offers a variety of Achromatic Waveplates such as: Super Achromatic Waveplates, Fresnel Rhomb Retarders, Achromatic Half Waveplates, Achromatic Quarter Waveplates.
★ Epoxy Cemented or Air Spaced available
★ Very Broad Bandwidth
★ Custom size available
★ RoHS Compliant
Specifications
| Material | Crystal Quartz+MgF2 |
| Dimension Tolerance | +0.0/-0.2mm |
| Surface Quality | 40/20 scratch and dig |
| Clear Aperture | >90% central area |
| Wavefront Distortion | <λ/4@632.8nm (for air spaced type) |
| Parallelism | <10 arc seconds (for single plate) |
| Retardation Tolerance | <λ/100 |
| Standard Wave | quarter-wave(λ/4), half-wave(λ/2) |
| Standard Wavelength | 450-650nm
550-750nm
650-1100nm
900-2100nm |
| Coating | Both sides AR coated, R<1% per face |
| Damage Threshold | Cemented: >500mJ/cm2, 20ns, 20Hz @1064nm
Air spaced: >5J/cm2, 20ns, 20Hz @1064nm |