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Magnesium fluoride is a white crystalline salt composed of one magnesium ion and two fluoride ions. Magnesium fluoride is transparent over an extremely wide range of wavelengths. Windows, lenses, and prisms made of this material can be used over the entire range of wavelenths from 0.120 mm vacuum (ultraviolet) to 8.0 mm (infrared). MgF2 is tough and works and polishes well.
We are able to provide the MgF2 single crystals boules or blanks with maxium diameter 85mm, also provide the custom optics like lens, prisms and windows made from MgF2.
Specifications:
Size range: Maxium diameter 85mm;
Optics available: Blanks, Lens, prisms, windows and custom components;
Surface Quality: 20/10 S/D to 80/50 S/D;
Flatness: Highest at Lambda/8 @ 633nm;
Physical Properties:
- Lattice constant: a=4.621A; c=3.053A
- Mohs hardness: 6
- Density: 3.17g/cm3
- Transparence range: 0.12 - 8.5mm
- Thermal conductivity: 0.0075W/m/K
- Expansion coefficient: aa=13.7x10-6/K; ac=8.48x10-6/K
- Refraction Index: @405nm no=1.3836, ne=1.3957
- Poisson Ratio: 0.276
Optical Properties:
Optical Properties |
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Transparence range |
0.12-8.5mm |
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Absorption Coefficient |
40 x 10-3 cm-1 at 2.7mm |
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Reflection Loss |
5.2% at 0.6 microns (2 surfaces) |
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Restrahlen Peak |
20mm |
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dN/dT |
2.3 (parallel) & 1.7 x 10-6 (perp) at 0.4mm |
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dN/d?nbsp |
= 0 1.4mm |
Transmission Curve: 
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