CaF2 Window Used in Infrared Gas Analyser
1. CaF2 MATERIALCaF2 crystal have good performance at 0.13~10 μm wavelength range, wide range of light.CaF2 cyrstal is transparent over a broad range from ultraviolet (UV) to infrared (IR) frequencies.CaF2 is used to manufacture optical components such as windows and lenses, used in thermal i......
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Product Description
CaF2 crystal have good performance at 0.13~10 μm wavelength range, wide range of light.CaF2 cyrstal is transparent over a broad range from ultraviolet (UV) to infrared (IR) frequencies.
CaF2 is used to manufacture optical components such as windows and lenses, used in thermal imaging systems, spectroscopy, and excimer lasers, Fourier analysis, testing instruments, gas liquid laser system, astronomical telescope, MIR/NIR imaging system, etc.
2. Properties
| Optical Properties | |
| Transmission Range | 130 nm to 10 μm |
| Transmittance | >94% at 193 nm to 7.8 μm |
| Refractive Index | 1.39908 at 5 μm |
| Reflection Loss | 5.4% at 5 μm (both surfaces) |
| Absorption Coefficient | 0.03 cm-1 at 2.6 μm to 2.9 μm |
| dn/dT | -10.6 x 10-6 /ºC |
| Physical Properties | |
| Density | 3.18 g/cm3 |
| Melting Point | 1360ºC |
| Thermal Conductivity | 9.71 Wm-1K-1 at 286K |
| Thermal Expansion | 18.85 x 10-6 /ºC at 273K |
| Knoop Hardness | 158.3 with 100g indenter (kg/mm2) |
| Specific Heat Capacity | 854 J/(kg.k) |
| Dielectric Constant | 6.76 at 1MHz |
| Youngs Modulus (E) | 75.80 GPa |
| Shear Modulus (G) | 33.77 GPa |
| Bulk Modulus (K) | 82.71 GPa |
| Elastic Coefficient | C11=164; C12=53; C44=33.7 |
| Apparent Elastic Limit | 36.54 MPa (3900 psi) |
| Poisson Ratio | 0.26 |
| Chemical Properties | |
| Solubility | 0.0017 g/ 100g water at 20ºC |
| Molecular Weight | 78.08 |
| Structure | Cubic Crystal |
| Cleavage Plane | -111 |
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