|
| |
|
| Magnesium Fluoride(MgF2) |
Magnesium Fluoride is used for optical elements in the ultraviolet and infrared where extreme ruggedness and durability is required. Its useful transmission range is 0.11µm - 7.5µm . Irradiation does not lead to color centers.
| Optical property |
| Crystal Class |
Tetragonal |
| Density at 291K ,g/cm3 |
3.18 |
Thermal Conductivity W/(mk)at 300K |
14-15 |
Thermal Expansion 1K at 310K
Paralle
Perpendicular
|
14X10-6
8.9X10-6 |
| Reflection loss,% for tow surfaces in the visible |
4.8 |
| Apparent Elastic Limit.MPa |
49.64 |
| Lattice Constant,Å |
a=4.64,c=3.06 |
| Dielectric Constant for 95X103-42X106Hz |
5.45 |
| Melting Point,K |
1528 |
Specific Heat,cal/(gK)
at 298K
at1700K
|
0.24
0.362 |
| Knoop Hardness,kg/mm2 |
415 |
| Young's Modulus,GPa |
138.5 |
| Shear Modulus,Gpa |
54.66 |
| Bluk Modulus,GPa |
101.32 |
| Poisson's Ratio |
0.276 |
| Bandgap,eV |
10.8 |
| Water Solubility |
None |
| Refractive Index |
Wavelength |
ne |
no |
0.20 |
1.43 |
1.42 |
0.23 |
1.42 |
1.41 |
0.27 |
1.41 |
1.40 |
0.34 |
1.40 |
1.39 |
0.56 |
1.39 |
1.38 |
|
| MgF2 Window
|
|
|
Material |
Magnesium Fluoride |
General |
Precise |
| Dimension Tolerance |
+/-0.1mm |
+/-0.05mm |
| Claer Aperture |
80% |
90% |
| Surface Faltness |
1/4L@
633nm |
1/8L@633nm |
| Surface Quality |
40-20 |
10-5 |
|
|
