Barium fluoride (BaF2) window

K9 optical window
  •  Excellent transmittance between 200nm – 12μm.
  • Resistant to high-energy radiation.
  • Non coated version can provide high transmittance.
  • Barium fluoride is a fast scintillator that can be used to detect X-rays, gamma rays or other high-energy particles, such as 511 keV gamma photons in positron emission computed tomography (PET). BaF2 can also be used to detect high-energy neutrons or to separate them from simultaneous gamma photons by using pulse shape discrimination technology.
  • Due to Barium fluoride (BaF2) window chip has wide bandwidth transmittance and can transmit from far ultraviolet to long wave infrared. Therefore, this product can be used in various applications, such as infrared spectroscope. The low refractive index of barium fluoride is 1.48, which can provide high transmittance without antireflection film. In a dry environment, barium fluoride window sheets can withstand ambient temperatures up to 800 °, but prolonged contact with water will reduce the transmittance in the vacuum ultraviolet range. However, compared with calcium fluoride window sheet, barium fluoride window sheet has lower resistance to water. BaF2 window sheet is the most resistant optical fluoride to high-energy radiation, but has lower UV transmission. BaF2 has a Knoop hardness of 82.
  • Note: these optical windows are very sensitive to thermal shock.
Technical parameters
Items Parameters
Material Barium fluoride (BaF2)
Radius of curvature ± 1mm - ± 50000mm ± 1%
Diameter 3mm-300mm ± 0.1mm
Center thickness tolerance ± 0.05mm (we can process to ± 0.01mm with high precision)
Center deviation 3′(we can process to 30 ″with high precision)
Surface accuracy λ/ 2
Surface quality 40/20 (we can process to 10-5 with high precision)
Effective caliber ≥90%
Coating According to the custom requirements
spectral curve

In addition, We can customize the optical window according to customer requirements or drawings.

For details, please consult:

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