Color Glass Filters
| Material | Color glass from Schott or equivalent |
| Dimension Tolerance | +0.00/-0.10mm |
| Thickness Tolerance | ±0.20mm |
| Clear Aperture | >90% |
| Parallelism | < 30", up to 3" |
| Surface Quality | 60-40 commonly, up to 40-20 |
| Flatness | λ/4 commonly, up to λ/10 |
| Chamfer | Protective Bevel <0.25mmx45deg |
