Knight Optical’s Magnesium Fluoride (MgF2) Windows

17 Apr 2021

Known for their resistance to mechanical and thermal shock, our Magnesium Fluoride (MgF₂) Windows are specified for a variety of applications operating in a range of harsh environments. Commonly employed for high-tech applications include excimer lasers, Fourier-transform infrared spectroscopy (FTIR), thermography and other infrared (IR) systems, MgF₂’s durability and birefringent properties make for a sought-after optical window across a spectrum of industries. What’s more, its stability in water means it’s ideally suited for outer surfaces, such as windows.

With its birefringence (beneficial for polarisers in the UV waveband), transmittance between 0.1µm and 7µm and at over 90% between 0.4-5.0µm and hardness of circa HK576, MgF₂ is one of the hardest optical fluorides. 

Here at Knight Optical, we stock a wide range of MgF₂ Windows suitable for a variety of diverse applications. Furthermore, for applications requiring tailored solutions, we also supply custom-made MgF₂ Windows in a range of sizes, shapes, substrates (including infrared [IR] MgF₂ materials) and tolerances for seamless integration with any device. Alongside our customised offering, we also supply MgF₂ Windows mounted into cells and can edge down stock in-house for quick lead times. 

Typical Specs:

Material: Magnesium Fluoride (MgF₂)

Diameter: +/-0.2mm

Thickness:  ± 0.2mm

Surface quality: <60-40 Scratch/Dig

First-Class Quality 

Quality is the driving force behind Knight Optical, and to ensure you profit from high-precision optics, we take the utmost care to ensure every component accurately meets your specifications. Offering unparalleled service, Knight Optical undertakes a full inspection of your optics from our ISO 9001:2015-certified, state-of-the-art Metrology Laboratory, followed by a meticulous visual examination by our dedicated QA department. 

To discover how we can enhance your supply chain experience and to learn more about our stock and custom-made MgF₂ Windows, contact a member of our technical sales team today. 

UK, Europe, Asia & RoW: E-mail info@knightoptical.co.uk 

Tel +44 (0)1622 859444

USA & Canada: E-mail usasales@knightoptical.com 

Tel +001 401-583-7846 

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