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Alkor Technologies supply a range of quality Magnesium Fluoride optical components including MgF2 windows, MgF2 lenses, MgF2 wedges and MgF2 blanks either from stock or custom made to your specification for VUV applications. Also we have own growth facility for MgF2 crystal growth.
The largest diameter of MgF2 optics - 80mm.
MgF2 lenses catalog
MgF2 windows catalog
MgF2 optical wedges
MgF2 datasheet in PDF
Contact our Sales Team now for your MgF2 optics price!
MgF2 window transmission, from UV to IR. Sample thickness 10mm.
Magnesium Fluoride is used for optical elements in the infrared where extreme ruggerness and durability is required. The single MgF2 crystal exhibits slight birefringence through its useful transmission range and its birefringence in the infrared could be useful.
Magnesium Fluoride is similar to Calcium Fluoride in its resistance to water. The MgF2 windows is sensitive to thermal shock, but does not cleave. Irradiation does not lead to color centers.
MgF2 transmits well into the DUV / VUV region at the hydrogen Lyman-alpha line (121nm) and beyond. MgF2 windows and lenses are also used for most UV optics and is excellent for eximer laser application.
|
| nm |
T |
nm |
T |
nm |
T |
| 115 |
24.0 |
145 |
78.0 |
185 |
90.0 |
| 117.5 |
38.5 |
147.5 |
79.5 |
190 |
91.0 |
| 120 |
50.0 |
150 |
80.0 |
195 |
91.0 |
| 122.5 |
58.5 |
152.5 |
82.0 |
200 |
92.0 |
| 125 |
64.0 |
155 |
83.0 |
202 |
92.0 |
| 127.5 |
68.0 |
157.5 |
84.0 |
204 |
93.0 |
| 130 |
69.0 |
160 |
85.0 |
205 |
93.0 |
| 132.5 |
71.0 |
162.5 |
86.0 |
206 |
93.0 |
| 135 |
72.0 |
165 |
86.0 |
208 |
93.0 |
| 137.5 |
74.0 |
170 |
87.0 |
210 |
93.0 |
| 140 |
75.0 |
175 |
88.0 |
215 |
93.0 |
| 142.5 |
76.0 |
180 |
89.0 |
220 |
93.0 |
| MgF2 Magnesium fluoride data |
| Chemical Formula |
MgF2 |
| Crystal Class |
tetragonal |
| Lattice Constant, Å |
a=4.64; c=3.06 |
| Molecular Weight |
62.31 |
| Density, g/cm3 at 291 K |
3.18 |
| Reflection Loss, % for two surfaces in the visible |
4.8 |
| Dielectric Constant for 95 x 103-42x106 Hz |
5.45 |
| Melting Temperature, K |
1528 |
| MgF2 Thermal Conductivity, W/(m K) at 300 K |
14-15 |
Thermal Expansion, 1/K at 310 K
parallel
perpendicular |
14x10-6
8.9x10-6 |
Specific Heat, cal/(g K)
at 298 K
at 1700 K |
0.24
0.362 |
| Bandgap, eV |
10.8 |
| Solubility in water |
None |
| Knoop Hardness, kg/mm2 |
415 |
| Young's Modulus, GPa |
138.5 |
| Shear Modulus, GPa |
54.66 |
| Bulk Modulus, GPa |
101.32 |
| Apparent Elastic Limit, MPa |
49.64 |
| Poisson Ratio |
0.276 |
|
| No = Ordinary Ray, Ne = Extraordinary Ray |
| 0.1198 |
1.6510 |
|
0.121 |
1.628 |
1.632 |
| 0.140 |
1.5095 |
1.523 |
0.150 |
1.480 |
1.494 |
| 0.170 |
1.448 |
1.462 |
0.180 |
1.439 |
1.453 |
| 0.200 |
1.423 |
1.437 |
0.220 |
1.413 |
1.426 |
| 0.257 |
1.401 |
1.414 |
0.266 |
1.399 |
1.412 |
| 0.300 |
1.393 |
1.405 |
0.330 |
1.389 |
1.402 |
| 0.350 |
1.387 |
1.400 |
0.355 |
1.386 |
1.399 |
| 0.546 |
1.379 |
1.390 |
0.700 |
1.376 |
1.388 |
| 1.512 |
1.370 |
1.382 |
2.000 |
1.368 |
1.379 |
| 3.030 |
1.360 |
1.370 |
3.571 |
1.354 |
1.364 |
| 4.546 |
1.341 |
1.350 |
5.000 |
1.334 |
1.343 |
| 6.060 |
1.314 |
1.321 |
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