Calcium fluoride (CaF2) optical window

K9 optical window
  • The calcium fluoride optical window is between 250 nm and 7 nm μ M has excellent transmittance, so it is widely used in products such as spectroprism, window sheet and lens. Because of its low absorbance and high damage threshold, it has become an ideal choice for excimer laser optics. The low refractive index of calcium fluoride also enables it to be used without antireflection film. The Knoop hardness of calcium fluoride is 158.3. TECHSPEC ® Calcium fluoride (CaF2) window sheet is made of vacuum UV grade calcium fluoride and is often used in low-temperature cold and thermal imaging systems.

Technical parameters
Items Parameters
Material Calcium fluoride (CaF2)
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/ 8 (high precision, we can process to 1 / 10λ)
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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