f anti-reflective coating is added to both facets of lens, loss of light energy can be effectively decreased. At the same time, it helps to protect facet of lens against moisture, chemical reaction and physical damages.
| Reflectivity (Single side) | Range | Wavelength (nm) |
| R<0.25% | λ ± 30nm | 650,808,850,980,1310,1550 |
| R<0.25% | λ ± 30nm | 850,1310,980,1550,1310,1550 |
| R<0.5% | λ ± 100nm | 850,1310,1550 |
| R<0.5% | 1250~1650 |
