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MgF2 Window

MgF2 is a tetragonal positive birefringent crystal. MgF2 has good chemical, mechanical and thermal characteristics compared with CaF2. Due to its high vacuum UV transmission and high damage threshold, MgF2 is usually used in VUV and excimer laser windows, polarizers, lenses and etc.

Lattice Constant: a=4.621A; c=3.053A

Mohs Hardness: 6

Density: 3.17g/cm3

Transparency Range: 120nm ~ 7000nm

Thermal Conductivity: 0.0075W/m/K

Thermal Expansion Coefficient: ||a=13.7x10-6/K, ||c=8.48x10-6/K

Index of Refraction: @405nm no=1.3836, ne=1.3957


Specifications

Material

MgF2 single crystal

Dimension Tolerance

+0.0/-0.1mm

Thickness Tolerance

±0.2mm

Clear Aperture

>90%

Parallelism

<1 arc minutes

Surface Quality

80/50 or 60/40 or 40/20

Flatness

<λ /[email protected] or better

Chamfer

Protected <0.5mmx45deg

Coating

None, per your request




 
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