Calcium Fluoride is used for optical windows, drilled discs, lenses and prisms in transmision range 0.15-9µm. Degradation due to to moisture in the atmosphere is minimal, and polished surfaces of the CaF2 windows may be expected to withstand several years exposure to normal atmospheric conditions.
Since they are nonaxial, CaF2 crystals do not require consideration of axial direction. Because of CaF2 low refractive index, Calcium Fluoride windows can be used without an anti-reflection coating.
Typical applications: VUV - UV - IR imaging systems, excimer laser windows, CaF2 viewport, Spectroscopic windows and lenses.We produce CaF2 windows and mirrors for European manufacturers of gas detectors and gas analyzers.
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Standard precision
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High-precision
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Dimension Tolerance
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φ5-150mm+0/-0.2
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φ3-200mm+0/-0.2
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Thickness Tolerance
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1-50mm+/-0.1
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1-50mm+/-0.05
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Parallelism
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1 arc minutes
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10 arc seconds
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Surface Quality
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60/40
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20/10
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Flatness
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N<λ 2@633nm(at="">
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N<λ 10@633nm(at="">
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Clear Aperture
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>90%
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>95%
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Chamfer
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Protected <0.5mmx45deg
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Protected <0.5mmx45deg
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Chemical Formula
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CaF2
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Crystal Class
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Cubic, cleaves [111] plane
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Lattice Constant, Å
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5.46
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Density, g/cm3 (20 °C)
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3.18
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Molecular Weight
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78.08
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Dielectric Constant for 105 Hz
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6.76
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Melting Temperature, K
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1630
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Thermal Conductivity, W/(m K) at 273 K
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10
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Thermal Expansion, 1/K at 300 K
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18.9 x 10-6
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Specific Heat, cal/(g K) at 273 K
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0.204
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Debye Temperature, K
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510
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Young's Modulus, GPa
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75.79
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Rupture Modulus, GPa
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0.0365
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Shear Modulus, GPa
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33.76
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Bulk Modulus, GPa
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83.03
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Poisson's Ratio
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0.28
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Knoop Hardness, kg/mm2
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178 [100], 160 [110]
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a: Dimesion size : 5-300mm , thickness up to customer requirements
b: Many material could be choosed, like BK7, Fused Silica, Sapphire, MgF2, CaF2, Ge, Si, Znse, ZnS and so on.
c: AR HR DLC coating or as your request
Packing Details: Protective film or Capacitor paper,Pearl cotton,Cardboard box.
Delivery Details: 7 days for stock.
3-4 weeks for custom-made products for sample.
in common, 4 weeks for mass production
What's the way of shipping?
We commonly use UPS, FedEx, DHL, TNT, SF, EMS etc. If you have your own express account, it's great.
How to pay?
We usually draft Trade Assurance Order on Alibaba, you can pay by the most convenient way which also protect most of your rights.
What's the deliver time?
For inventory: the delivery time is around 5 workdays.
Customized products: the delivery time is 10 to 30 workdays. According to the quantity and precision.
How to ensure the safety of payment?
our company is the gold supplier and supports Alibaba Trade Assurance. Payment<=5000USD, 100% in advance. Payment>5000USD, 50% T/T in advance, balance before shippment.
Can I customize the products based on my need?
Yes, we can customize the material, specifications and optical coating for your optical components based on your needs. OEM is available.
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