Del Mar Photonics - Greyhawkoptics

BaF2 windows for IR spectrometers

BaF2 - Barium Fluoride

Model   Product Name+   Price   Buy Now   WG-BF-25.4-10-1.55   BaF2 wedge, 25.4 mm x 10.0 mm x 1.55 mm   $129.00     WG-BF-25.4-10-2.1   BaF2 wedge, 25.4 mm x 10.0 mm x 2.1 mm   $129.00     WG-BF-25.4-10-2.5   BaF2 wedge, 25.4 mm x 10.0 mm x 2.5 mm   $129.00     W-BF-12.7-2   BaF2 window, ø 12.7 mm x 2.0 mm   $62.00     W-BF-15-4   BaF2 window, ø 15.0 mm x 4.0 mm   $39.00     W-BF-25.4-6   BaF2 window, ø 25.4 mm x 6.0 mm   $136.00     W-BF-4-0.5   BaF2 window, ø 4" x 0.5", polished, uncoated   $1,200.00     W-BF-8-1.2   BaF2 window, ø 8.0 mm x 1.2 mm   $52.00

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Barium Fluoride (BaF₂) is similar to Calcium Fluoride in it's properties and is used for optical windows, lenses, and prisms, particularly when transmission into the ultraviolet is desired. The transmission range is from 0.2m m to 11m m. Transmission in the VUV is degraded by prolonged exposure to a moist atmosphere, but it is not significantly degraded by exposure to high energy radiation.

Barium Fluoride is less resistant to attack by water than Calcium Fluoride but attack does not begin until 500⁰C. In the dry atmosphere Calcium Fluoride can be used up to 800⁰C. Barium Fluoride is the most resistant fluoride to high energy radiation but does not have the VUV transmission of other types. The material is very sensitive to thermal shock.

Physical Properties:

Del Mar Photonics - Greyhawkoptics