- Product Name: CaF2
- Maximum of Material Diameter：Φ375mm
- Clear Aperture： 85%
- Surface Flatness：λ/4 at 633nm
- Surface Quality：20/10
Product overview
Calcium Fluoride crystal shows good optical and thermo-mechanical properties, can be used for optical windows, lenses, prisms within a wide range from 130nm to 9μm. It has optical properties of isotropy, low absorption and low refractive index, which made CaF2 gain the unique advantages in the application of high power lasers.Scitlion is able to offer
CaF2 IR viewport Windows for Infrared Thermography at 8μm to 10μm
Various optics for IR & VUV application, using our CaF2 crystal materials
Good quality CaF2 crystal blank materials
OEM service for good quality CaF2 crystals
Orientation：<100>、<110>、 <111>
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Optical Properties |
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Transmission Range |
130 nm to 10 μm |
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Transmittance |
>94% at 193 nm to 7.8 μm |
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Refractive Index |
1.39908 at 5 μm |
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Reflection Loss |
5.4% at 5 μm (both surfaces) |
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Absorption Coefficient |
0.03 cm-1 at 2.6 μm to 2.9 μm |
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dn/dT |
-10.6 x 10-6 /℃ |
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Physical Properties |
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Density |
3.18 g/cm3 |
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Melting Point |
1360℃ |
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Thermal Conductivity |
9.71 Wm-1K-1 at 286K |
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Thermal Expansion |
18.85 x 10-6 /℃ at 273K |
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Knoop Hardness |
158.3 with 100g indenter (kg/mm2) |
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Specific Heat Capacity |
854 J/(kg.k) |
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Dielectric Constant |
6.76 at 1MHz |
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Youngs Modulus (E) |
75.80 GPa |
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Shear Modulus (G) |
33.77 GPa |
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Bulk Modulus (K) |
82.71 GPa |
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Elastic Coefficient |
C11=164; C12=53; C44=33.7 |
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Apparent Elastic Limit |
36.54 MPa (3900 psi) |
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Poisson Ratio |
0.26 |
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Chemical Properties |
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Solubility |
0.0017 g/ 100g water at 20℃ |
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Molecular Weight |
78.08 |
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Structure |
Cubic Crystal |
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Cleavage Plane |
(111) |
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