Zero Order Dual Wavelength Waveplate can provide the retardance at two wavelengths (the fundamental wavelength and the second harmonic wavelength) at the same time, and is widely used in femtosecond lasers.
| 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/30 |
| Coating | R<0.5%@two wavelengths |
| Damage Threshold | >10J/cm2, 20ns, 20Hz@1064nm |
| * Remark：Customized is available | |
