| Parameter | Windows/filter Standard Specification |
| Material | Glass, Fused Silica etc. |
| Diameter | 3~480mm |
| Diameter Tolerance | +/-0.1mm |
| Parallelism | <5" |
| Flatness(in 25mm area) | N=2, △N=1 |
| Surface Quality | 20-10 |
| Chamfer | 45°,<C0.1mm |
| Coating | AR film, Reflection film, Splitter film,IR Cut,ITO etc. |
* Remark：Customized is available | |
