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By certification 
Magnesium Fluoride (MgF2) Windows offer excellent broadband transmission from the deep-UV to the mid-infrared. DUV transmission makes them ideal for use at the Hydrogen Lyman-alpha line and for UV radiation sources and receivers, as well as excimer laser applications. MgF2 is a rugged material resistant to chemical etching, laser damage, and mechanical and thermal shock. It has a Knoop Hardness of 415 and index of refraction of 1.38.
Key features:
• Excellent Transmission from 120nm to 7μm
• Rugged and Durable
• Resistant to Chemical Etching
Specifications
Material: MgF2 single crystal
Optical Axis Orientation: A-cut ( <100>-cut )
+/- 0.5°
Diameter tolerance: + 0 / -0.10 mm
Thickness tolerance: + / - 0.10 mm
Clear aperture: 90% of the diameter
Surface quality: 20-10 scratch and dig
Surface accuracy: Lambda/4 @ 632.8 nm
Perpendicularity: < 10 arc min
Parallelism: 15 arc seconds
Key features:
• Excellent Transmission from 120nm to 7μm
• Rugged and Durable
• Resistant to Chemical Etching
Specifications
Material: MgF2 single crystal
Optical Axis Orientation: A-cut ( <100>-cut )
+/- 0.5°
Diameter tolerance: + 0 / -0.10 mm
Thickness tolerance: + / - 0.10 mm
Clear aperture: 90% of the diameter
Surface quality: 20-10 scratch and dig
Surface accuracy: Lambda/4 @ 632.8 nm
Perpendicularity: < 10 arc min
Parallelism: 15 arc seconds
