Фторид Магния MdF2

МакроОптика produces lenses, windows, prisms, wedges, cylindrical lenses and others optical components according to customers’ specifications and drawings out of crystals magnesium fluoride MgF2.

Magnesium Fluoride transmits well into the VUV region to the hydrogen Lyman-alpha line (121nm) and beyond. Magnesium Fluoride is used mostly for UV optics and is excellent for Excimer laser applications.

Magnesium Fluoride is grown by vacuum Stockbarger technique in ingots of various diameters. Magnesium Fluoride is a tough material and polishes well. Therefore, it can be worked to the highest standards. MgF2 is slightly birefringent and usually supplied with the optic axis cut perpendicular to the window faces.

Product Data

Transmission Range  0.12 to 7 Ојm (1)
Refractive Index  No 1.413 at 0.22 Ојm (4)
Reflection Loss  5.7% at 0.22 Ојm (2 surfaces)
Absorption Coefficient  40 x 10-3 cm-1 at 2.7 Ојm
Reststrahlen Peak  20 Ојm (1)
dn/dT  2.3 (para) 1.7 (perp) at 0.4 Ојm (1)
dn/dОј 0:1.4 Ојm
Density  3.18g/cc
Melting Point  1255В°C
Thermal Conductivity  21 (para) 33.6 (perp) W m-1 K-1 at 300K (3)
Thermal Expansion  13.7 (para) 8.9 (perp) x 10-6 /K (1)
Hardness  Knoop 415
Specific Heat Capacity  1003 J Kg m-1 K-1
Dielectric Constant  4.87 (para) 5.45 (perp) at 1MHz (1)
Youngs Modulus (E)  138 GPa (2)
Shear Modulus (G)  54.66GPa (2)
Bulk Modulus (K)  101.32 GPa (2)
Elastic Coefficients  C11=140 C12=89 C44=57 C13=63 C66=96 (2)
Apparent Elastic Limit  49.6 GPa (7200 psi)
Poisson Ratio  0.276 (2)
Solubility  0.0002g/100g water
Molecular Weight  62.32
Class/Structure  Tetragonal, can cleave on c-axis

Transmittance

Refractive Index

No = Ordinary Ray Ne = Extraordinary Ray

µm No Ne µm No Ne µm No Ne
0.1137 1.7805   0.1149 1.7420   0.1179 1.6800  
0.1198 1.6510   0.121 1.628 1.632 0.130 1.566 1.568
0.140 1.5095 1.523 0.150 1.480 1.494 0.160 1.461 1.475
0.170 1.448 1.462 0.180 1.439 1.453 0.190 1.431 1.444
0.200 1.423 1.437 0.220 1.413 1.426 0.248 1.403 1.416
0.257 1.401 1.414 0.266 1.399 1.412 0.280 1.396 1.409
0.300 1.393 1.405 0.330 1.389 1.402 0.337 1.389 1.401
0.350 1.387 1.400 0.355 1.386 1.399 0.400 1.384 1.396
0.546 1.379 1.390 0.700 1.376 1.388 1.087 1.373 1.385
1.512 1.370 1.382 2.000 1.368 1.379 2.5 1.364 1.375
3.030 1.360 1.370 3.571 1.354 1.364 4.000 1.349 1.359
4.546 1.341 1.350 5.000 1.334 1.343 5.556 1.324 1.332
6.060 1.314 1.321