- Product Name: MgF2
- Maximum of Material Diameter:Φ170mm
- Clear Aperture:85%
- Surface Flatness:λ/4 at 633nm
- Surface Quality:20/10
Product overview
Magnesium Fluoride crystal is used as a lens, prism and window for wavelength from 110nm to 7.5μm. It is a most suitable material as window for ArF Excimer Laser, for the reason of its good transmission at 193nm. It is also effective as an, optical polarizing element in the ultraviolet region. Any more MgF2 crystal has fine grain, which is appropriate as a vacuum evaporation coating materials.Scitlion is able to offer
Various optics for IR & VUV application, using our MgF2 crystal materials
MgF2 VUV Windows for ArF Excimer Laser
Good quality MgF2 crystal blank materials
OEM service for good quality MgF2 crystals
Orientation：<001>、<100>、<110>、<210>、<111>
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Optical Properties |
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Transmission Range |
110 nm to 7.5 μm |
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Transmittance |
>90% at 193 nm to 6 μm |
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Refractive Index |
No=1.37608; Ne=1.38771 (at 0.7μm) |
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Reflection Loss |
5.2% at 0.6 μm (both surfaces) |
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Residual Radiation Peak |
20 nm |
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Absorption Coefficient |
0.04 cm-1 at 2.7 μm |
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dn/dT |
2.3 x 10-6 /℃ parallel c-axis 1.7 x 10-6 /℃ perpendicular c-axis |
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Physical Properties |
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Density |
3.18 g/cm3 |
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Melting Point |
1255℃ |
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Thermal Conductivity |
0.3 Wm-1K-1 at 300K |
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Thermal Expansion |
13.7 x 10-6 /℃ parallel c-axis 8.9 x 10-6 /℃ perpendicular c-axis |
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Knoop Hardness |
415 with 100g indenter (kg/mm2) |
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Specific Heat Capacity |
1003 J/(kg.k) |
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Dielectric Constant |
1.87 at 1MHz parallel c-axis 1.45 at 1MHz perpendicular c-axis |
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Youngs Modulus (E) |
138.5 GPa |
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Shear Modulus (G) |
54.66 GPa |
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Bulk Modulus (K) |
101.32 GPa |
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Elastic Coefficient |
C11=164; C12=53; C44=33.7 C13=63; C66=96 |
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Apparent Elastic Limit |
49.6 MPa (7200 psi) |
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Poisson Ratio |
0.276 |
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Chemical Properties |
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Solubility |
0.0002 g/ 100g water at 20℃ |
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Molecular Weight |
62.32 |
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Structure |
Tetragonal Crystal |
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Cleavage Plane |
(110) |
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