| Specifications | According to customer's specific requirements |
| Wavelength Range | 587.6 nm |
| Material | H-K9L(BK7), JGS1(Corning 7980) |
| Diameter Tolerance | +0.0 / -0.1 mm |
| Central Thickness Tolerance | ±0.2 mm |
| PV | λ/2 (<0.32) |
| Surface Quality | 60/40 |
| Centering Error | ≤3′ |
| Coating | Multi-layer Anti-reflection (AR) Coating |