Coating Type Filter
Metallic Coating type
Specifications:
| Material | BK7 glass or Fused Silica |
| Flatness | 2λ per 25 mm |
| Surface Quality | 80/50 Scratch/Dig |
| Parallelism | 3 min |
| Dimension Tolerance | +/-0.2mm |
| Coating | Vacuum-deposited metallic alloy |
| Optical density Tolerance | +/-5% |