| Specifications | According to customer's specific requirements |
| Material | Hot-pressed Polycrystalline ZnS; CVD Multispectral ZnS (optional) |
| Diameter Tolerance | ±0.01-0.2mm |
| Central Thickness Tolerance | ±0.1mm |
| PV | λ/4 |
| Parallelism | <3' |
| Surface Quality | 60/40, 40/20, 20/10 |
| Coating | AR coating, DLC |
