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MgF2 Window
Magnesium Fluoride (MgF2) Windows offer excellent broadband transmission from the deep-UV to the mid-infrared. DUV transmission makes them ideal for use at the Hydrogen Lyman-alpha line and for UV radiation sources and receivers, as well as excimer laser applications. MgF2 is a rugged material resistant to chemical etching, laser damage, and mechanical and thermal shock. It has a Knoop Hardness of 415 and index of refraction of 1.38.
Description
Parameter
Description
Advantages
1 ) Excellent Transmission from 120nm to 7μm
2 ) Rugged and Durable
3 ) Resistant to Chemical Etching
Specifications
1 ) Diameter Tolerance: +/-0.2mm
2 ) Thickness Tolerance: +/-0.03mm
3 ) Aperture: >90%
4 ) Surface Quality: 80/50~10/5 (S/D)
5 ) Parallelism: <1 arc minute
6 ) Chamfer: 0.3-0.5mmx45°
Parameter
Advantages
| Optical Properties | |
|---|---|
| Transmission Range | 0.12 to 7 micron |
| Refractive Index | 1.413 at 0.22 micron |
| Refractive Loss | 5.7% at 0.22 micron |
| Crystal/Class Structure | Tetragonal |
| Cleavage Plane | (100), (110), imperfect |
| Mechanical Properties | |
|---|---|
| Density | 3.18 g/cc |
| Hardness (Knoop) | 415 |
| Youngs Modulus | 138 GPa |
| Shear Modulus | 54.66 GPa |
| Bulk Modulus | 101.32 GPa |
| Poisson Ratio | 0.276 |
| Elastic Limit | 49.6 GPa (7200psi) |
| Molecular Weight | 62.32 |
| Thermal Properties | |
|---|---|
| Thermal Expansion | 13.7 (para) 8.9 (perp) x10－6/K |
| Thermal Conductivity | 21 (para) 33.6(perp) W m－1K－1 at 300K |
| Melting Point | 1255℃ |
| Specific Heat Capacity | 1003 J Kg－1K－1 |
Technical Images
