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 |