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Magnesium Fluoride (MgF2) is a colourless, hard and durable material and is birefringent. The material's durability and resistance to mechanical and thermal shock enable it to be used in harsh conditions, in the form of windows, while its birefringence makes it useful for polarizers in the UV waveband. It transmits between 0.1µm and 7µm and at over 90% between 0.4-5.0µm. Magnesium Fluoride has a hardness of about HK576, making it the hardest of the optical fluorides. It is stable in water, which means that it can be used for outer surfaces, such as windows.

Knight Optical supply a range of quality Magnesium Fluoride windows either from stock or custom made to your specification for a range of applications. Every component is individually tested by our highly skilled technicians in our state of the art metrology lab to ensure all components meet our high quality standards.

Contact our multilingual technical sales team and discover how Knight Optical’s high quality Magnesium Fluoride windows and service can improve your instrumentation and supply chain experience.

Surface Quality:
Magnesium Fluoride
± 0.2mm
± 0.2mm
<60-40 scratch/dig

Note: Stectroscopic Standard Grade rectangular windows may be cut from the same sized diameter, so may have curved edges as a result. These types also come in drilled (with 30mm spacing)/undrilled versions for use alone or as a pair.

Mounting into cells.
Edging down to smaller sizes.

14 Items

Name Diameter (mm) Thickness (mm) Coating Material Price Buy
WMG1301 13 1 Uncoated Magnesium Fluoride
WMG1302 13 2 Uncoated Magnesium Fluoride
WMG1501 15 1 Uncoated Magnesium Fluoride
WMG1901 19 1 Uncoated Magnesium Fluoride
WMG2001 20 1 Uncoated Magnesium Fluoride
WMG2002 20 2 Uncoated Magnesium Fluoride
WMG2500 25 1 Uncoated Magnesium Fluoride
WMG2515 25 1.5 Uncoated Magnesium Fluoride
WMG2501 25 2 Uncoated Magnesium Fluoride
WMG2502 25 3 Uncoated Magnesium Fluoride
WMG2503 25 4 Uncoated Magnesium Fluoride
WMG2504 25 5 Uncoated Magnesium Fluoride
WMG2505 25.4 0.5 Uncoated Magnesium Fluoride
WMG3200 32 3 Uncoated Magnesium Fluoride

14 Items


Magnesium Fluoride Windows

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