Middle Infrared Zero Order Waveplate
Middle Infrared zero order waveplate is constructed by two Magnesium Fluoride (MgF2) 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. Middle Infrared zero order waveplates is widely used in infrared applications, ideally for 2.5-6.0 micron range.
- Ideal for Applications in the 2.5-6.0μm Range
- High Damage Threshold
- Better Temperature Bandwidth
- Wide Wavelength Bandwidth
- Both Sides AR Coated
Specifications
| Material | MgF2 |
| Dimension Tolerance | + 0.0/ -0.2 mm |
| Surface Quality | 60/40 |
| Clear Aperture | > 90% central area |
| Wavefront Distortion | < λ/4@632.8 nm |
| Parallelism(single plate) | < 5 arc seconds |
| Retardation Tolerance | < λ/100 |
| Standard Wave | quarter-wave(λ/4), half-wave(λ/2) |
| Wavelength Range | 2500-6000 nm |
| AR Coating | R < 0.5%@central wavelength |
| Damage Threshold | > 1 J/cm2, 20 ns, 20 Hz@1064 nm |
Model
| Dia., mm | Wavelengths, nm | Retardation | Type | CA*, mm |
| 12.7 | 2500/2700/2940 | λ/2, λ/4 | Optically Contacted | 11.5 |
| 3500/4000 | λ/2 | Single | ||
| 3500/4000/4500 | λ/4 | Optically Contacted |
* Mounted Version upon request.
Coating Vs. Retardation Curve
