
Specification:
| Material | Crystal quartz |
| Diameter Tolerance | +0.0,-0.2 mm |
| Thickness Tolerance | +/-0.2 mm |
| Surface Quality | 20-10 scratch and dig |
| Clear Aperture | >90% |
| Parallelism | <5 arc seconds |
| Wavefront Distortion | <λ/8@632.8nm |
| Thickness | T=0.5 mm, 1 mm, 1.5 mm, 2.0 mm |
| Coating | Uncoated |