| Specifications | According to customer's specific requirements |
| Material | As₂S₃, As₂Se₃, Ge-As-Se (IRG22/24/25/26), IRG201–207 series |
| Diameter Tolerance | ±0.01mm–±0.05mm |
| Central Thickness Tolerance | ±0.1mm |
| PV | λ/4 |
| Parallelism | <30'' |
| Surface Quality | 60/40,40/20, |
| Coating | Dual-side AR (3–5μm, 8–14μm, 3–14μm), DLC |
