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  • MgF2 Window

MgF2 Window

Magnesium Fluoride crystal is used as a lens, prism and window for wavelength from 110nm to 7.5μm.The MgF2 magnesium fluoride window can penetrate well through the VUV region to 121nm and beyond.Magnesium fluoride is mainly used in UV spectra and has good applications for excimer lasers.


Product Details

Magnesium Fluoride crystal is used as a lens, prism and window for wavelength from 110nm to 7.5μm.The MgF2 magnesium fluoride window can penetrate well through the VUV region to 121nm and beyond.Magnesium fluoride is mainly used in UV spectra and has good applications for excimer lasers. Magnesium fluoride under high energy radiation has only a slight effect on the preferred ultraviolet radiation optical element for space stations.It has been proved that magnesium fluoride material with high laser damage threshold and no color center is more suitable for the optical window material of excimer laser than calcium fluoride material.Magnesium fluoride is the preferred material for fluorination environment because of its chemical composition.


Application: 

MgF2 used in wave plate, laser system, coating crystal, vacuum window plate, PBS light source, microscope, optical instrument, etc.It is a birefringent optical material which can be used for polarized optical devices in the ultraviolet radiation region.


Feature:

Full Transmission 200-6000nm,UVA,UVB,Visible,Infrared.

Orientation:<001>、<100>、<110>、<210>、<111>

 

Manufacture Specification

Size:3-300mm

Size tolerance:+0.00/-0.01

Surface Quality:40-20

Flatness:1/4 [email protected]

AR Coating


Curve

MgF2 Window


Optical Properties
Transmission Range110 nm to 7.5 μm
Transmittance>90% at 193 nm to 6 μm
Refractive IndexNo=1.37608; Ne=1.38771 (at 0.7μm)
Reflection Loss5.2% at 0.6 μm (both surfaces)
Residual Radiation Peak20 nm
Absorption Coefficient0.04 cm-1 at 2.7 μm
dn/dT2.3 x 10-6 /℃ parallel c-axis1.7 x 10-6 /℃ perpendicular c-axis
Physical Properties
Density3.18 g/cm3
Melting Point1255℃
Thermal Conductivity0.3 Wm-1K-1 at 300K
Thermal Expansion13.7 x 10-6 /℃ parallel c-axis8.9 x 10-6 /℃ perpendicular c-axis
Knoop Hardness415 with 100g indenter (kg/mm2)
Specific Heat Capacity1003 J/(kg.k)
Dielectric Constant1.87  at 1MHz parallel c-axis1.45  at 1MHz perpendicular c-axis
Youngs Modulus (E)138.5 GPa
Shear Modulus (G)54.66 GPa
Bulk Modulus (K)101.32 GPa
Elastic CoefficientC11=164; C12=53; C44=33.7C13=63; C66=96
Apparent Elastic Limit49.6 MPa (7200 psi)
Poisson Ratio0.276
Chemical Properties
Solubility0.0002 g/ 100g water at 20℃
Molecular Weight62.32
StructureTetragonal Crystal
Cleavage Plane(110)




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