MgF2 window

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:

λ/4 @ 632.8 nm

Perpendicularity:

< 10 arc min

Parallelism:

15 arc seconds  



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