| Material | MgF2 Crystal | Wavelength | 110~8500nm |
| Size | 0.1mm-100mm | Surface Quality | 20/10 S/D |
| Optical Axis Orientation | <6 arc min | Parallelism | <1 arc sec |
| Flatness | λ/10 @ 633nm | Clear Aperture | >95% of full aperture |
Basic Properties:
| Transparency Range | 0.11~7.5μm | Molecular Weight | 62.32 |
| Class/Structure | Tetragonal, can cleave on C-axis | Density | 3.177g/cm3 |
| Melting Point | 1255℃ | Hardness | Knoop 415 kg/mm2 |
| Specific Heat Capacity, cal/(g K) | 0.24 @ 298K 0.362@1700K |
Thermal Conductivity | 0.3 W/(m K) at 27 °C |
| Thermal Expansion | 13.7and 8.48 x 10-6e/ °C | Refractive Index | N0=1.3836 Ne=1.3957 @ 0.405μm |
| Reflection Loss | 11.2% @ 0.12 μm (2 surfaces) | Dielectric Constant | 4.87 parallel and 5.45 perpendicular |
| Restrahlen Peak | 20μm | dN/dT | +2.3 and +1.7 x 10-6e/ °C at 0.4μm |
| Elastic Coefficients | C11=140.2 C12=89.5 C44=56.8 C33=204.7 C13=62.9 C66=95.7 |
Young's Modulus (E) | 138.5 GPa |
| Shear Modulus (G) | 54.66 GPa | Bulk Modulus (K) | 101.32 GPa |
| Apparent Elastic Limit | 49.64 MPa | Poisson Ratio | 0.276 |
| Solubility | <0.0002 g/100g water @ 0 °C | ||
Magnesium Fluoride (MgF2) single crystals has a very broad transmission spectrum from Deep Ultra-Violet (DUV) to Long Wavelngth Infrared (LWIR), that is 110nm to 7500nm. MgF2 crystals has a high resistance to thermal and mechanical shocks and optical radiation, and it is chemical stable. For its excellent DUV transmission propertiy, MgF2 crystals has become the most suitable materials for 193nm ArF and 248nm KrF excimer lasers. MgF2 has a large birefrigence, which make it suitable for fabrication of waveplates. MgF2 crystals can be used in MWIR and LWIR thermal imaging applications, and it is also used for thin film growth.
Hangzhou Shalom EO offers the optical windows, polarizers, prisms, lenses, wedged windows and waveplates made from MgF2 single crystals with high laser grade precision, they are widely used in the 193nm ArF excimer lasers and other Ultra-Violet (UV) lasers. The MgF2 crystals ingot, blanks, polished and coated optics are available upon your request.
