Super Achromatic Waveplate
Super Achromatic Waveplate is similar to achromatic waveplate but providing a flat retardance over a super broadband wavelength range. Normal achromatic waveplate consists of one quartz plate and one MgF2 plate, which has only few hundreds of nanometer wavelength range. Tuniu Optics’s super achromatic waveplate is made from three material, quartz, MgF2 and sapphire, which can provide flat retardance on a broader wavelength range.
- Flat Retardance Over a Super Broadband Range
- Custom Size & Wavelength Available
Specifications
| Material | Crystal Quartz + MgF2 + Sapphire |
| Dimension Tolerance | + 0.0/ -0.2 mm |
| Surface Quality | 60/40 |
| Clear Aperture | > 90% central area |
| Wavefront Distortion | < λ/4@632.8 nm (for single plate) |
| Parallelism | < 10 arc seconds (for single plate) |
| Retardation Tolerance | < λ/100 |
| Standard Wave | quarter-wave(λ/4), half-wave(λ/2) |
| Standard Wavelength | 380-1100 nm, 600-2000 nm |
| Coating | Upon request |
| Damage Threshold | > 500 mJ/cm2, 20 ns, 20 Hz@1064 nm |
Model
| Dia., mm | Wavelengths, nm | Retardation | CA, mm | Type | Mount, mm |
| 20 | 380-1100 | λ/4 | 18 | Cemented | / |
| 380-1100 | φ25.4 x 8 | ||||
| 600-2000 |
Coating vs Retardation Curve
