MgF2 Windows are made from Magnesium Fluoride material, which has transparent range from 120-7000 nm. The refractive index is 1.376 at 7000nm.

Specifications:
Material: --------------------------------------------------------- Magnesium Fluoride single crystal
Diameter Tolerance: ------------------------------------------ +0.0, -0.1mm
Thickness Tolerance:------------------------------------------ ±0.2mm
Clear Aperture: ------------------------------------------------->80%
Parallelism:------------------------------------------------------- 1 arc minute
Flatness:----------------------------------------------------------- λ/2 @ 632.8 nm
Surface quality: ------------------------------------------------- 40/20 scratch and dig
Protective Bevel:--------------------------------------------------<0.25x45deg
Coating:-------------------------------------------------------------Uncoated

MgF2 Main Properties and Performance

Founded in 1988 in Hefei, JOPTEC is a global leader in R&D and manufacturing of hermetic metal-glass packages for hybrid integrated circuits, high power laser, optical communication, infrared detector and other optoelectronic devices. With the continuous investment in new technologies and facilities, JOPTEC now covers an area of 21,000 square meters and has developed a complete and mature process for the design, manufacturing, testing and quality inspection for hermetic metal-glass packages. Over the past few decades, JOPTEC’s capability, quality consistency and reliability have been recognized by customers worldwide that range from major international companies of high power laser, optical communication, defense and aerospace agencies to medical and research establishments.