MgF2 Windows are made from Magnesium Fluoride material, which has
transparent range from 120-7000 nm. The refractive index is 1.376
at 7000nm.
Specifications:
Material: ---------------------------------------------------------
Magnesium Fluoride single crystal
Diameter Tolerance: ------------------------------------------
+0.0, -0.1mm
Thickness Tolerance:------------------------------------------
±0.2mm
Clear Aperture:
------------------------------------------------->80%
Parallelism:-------------------------------------------------------
1 arc minute
Flatness:-----------------------------------------------------------
λ/2 @ 632.8 nm
Surface quality: -------------------------------------------------
40/20 scratch and dig
Protective
Bevel:--------------------------------------------------<0.25x45deg
Coating:-------------------------------------------------------------Uncoated
MgF2 Main Properties and Performance
| Transmission range (μm) | 0.11~7.5 |
| Refractivity (0.7μm) | n0=1.37608 ne=1.38771 |
| Reflection Loss at 0.6μm | 5.2%(both faces) |
| Thermal expansion coefficient (℃-1) | 13.7(//axis c), 8.9(⊥axis c) |
| Thermal conductivity at 300K (Wm-1K-1) | 0.3 |
| Knoop Hardness (kg/mm2) | 415 |
| Solubility (g/100gH2O·0℃) | 0.0002 |
| Density (g/cm3) | 3.18 |
| Melting Point (℃) | 1255 |
