An optical filter that removes unwanted spectral components or interfering light from the incident light. There are two working principles of optical filters: one is based on the intrinsic absorption of materials, and the other is based on the interference effect of light. According to different principles, they can be divided into two types: absorption filters and interference filters.
| Project | Performance Parameters | High Precision |
| Material | H-ZF13, D-263T, RG715, NBK7, K9, KG3 | |
| Specifications | 6*10, 7*7, 4.5*6.5, 10*10, 12*10, 4*4 | |
| Dimension Tolerance | ±0.1 mm | ±0.05 mm |
| Flatness | λ/2 | λ/4 |
| Surface Quality | 80-50 | 60-40 |
| Coating | T > 85% | T > 99% |
| Damage Threshold | ||