This waveplate is a special kind of multi order waveplate. Dual wavelength waveplate is designed to be used in dual wavelength setups, for example, it can be operated as a quarter waveplate @1064nm and as a half waveplate @532nm at the same time. It's always used to manage the states of polarization of laser beams to obtain maximum conversion efficiency.
| Material | Crystal Quartz |
| Diameter Tolerance | +0-0.2mm |
| Surface quality | 20-10 |
| Wavefront Distortion | <λ/8@632.8nm |
| Clear Aperture | >90% |
| Parallelism | <1 arc second |
| Retardation Tolerance | <λ/100 |
| Coating | R<0.5%@two wavelengths |
| Damage Threshold | >5J/cm2,20ns, 20Hz@1064nm |
| * Remark：Customized is available | |
