Magnesium fluoride (MgF₂) is an optical material featuring broad UV-to-IR transmission, low refractive index, chemical stability, and moderate hardness. It has one of the lowest refractive indices among all optical materials, making it indispensable for applications such as deep UV optics, infrared windows, and anti-reflection coatings. MgF₂ is an excellent choice for cost-sensitive applications requiring broad spectral coverage or deep UV transmission.
Extremely wide transmission range
Excellent deep UV transmittance
Very low refractive index
Significant birefringence
| Crystal Structure | Tetragonal System |
| Internal Transmittance | >99.8%@193nm |
| Refractive Properties | Birefringent Crystal |
| Scratch/Dig | 10-5 |
| Crystal Orientations | (111) (001) (100) orientations are offered |
| Coating | Anti-Reflection, High-Reflection |
