Half Ball Lenses
half ball lens specifications
| Material | BK7, Quartz, Sapphire, Optical glass, Customer-designated materials |
| Diameter(Φ) | 0.8mm～50mm |
| Radius(R) | 0.4mm～25mm |
| Chamfer | Specified by customer |
| Coating | Specified by customer |
| Low grade | General grade | High grade | |
| Diameter tolerance | +/-0.008mm | +/-0.005mm | +/-0.003mm |
| Surface quality | 80-50 | 60-40 | 40-20 |
| Surface accuracy | 1.5λ | 1λ | 1/2λ |
| Central Thickness(Tc) | +/-0.1 | +/-0.05mm | +/-0.01 |
| Centration | 5' | 3' | 30'' |
