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| CALCIUM FLUORIDE CRYSTALS [ CaF2 ] |
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Calcium Fluoride is used for optical windows, lenses and prisms in the 0.15μm - 9μm range. This material has found wide use in high power laser optics due to its low absorption. Polished surfaces are stable and will last several years under normal conditions. Due to its low refractive index, Calcium Fluoride can be used without anti-reflection coating. Calcium fluoride is grown by vacuum Stockbarger technique. Material for IR use is grown using naturally mined fluorite, in large quantities at relatively low cost. |
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| Specification |
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 Transmission Range |
0.13 to 10μm |
| Refractive Index |
1.39908 at 5μm |
| Reflection Loss |
5.4% at 5μm [ 2 surfaces ] |
| Restrahlen Peak |
35μm |
| dn/dT |
-10.6 × 10-6/ °C |
| Density |
3.18 g/cm3 |
| Melting Point |
1360 °C |
| Thermal Conductivity |
9.71W/ [ m K ] |
| Thermal Expansion |
18.85 × 10-6/ °C |
| Hardness |
Knoop 158.3 kg/mm2 [ 100 ] |
| Specific Heat Capacity |
854J/ [ kg K ] |
| Dielectric Constant |
6.76 at 1MHz |
| Young's Modulus [ E ] |
75.8 GPa |
| Shear Modulus [ G ] |
33.77 GPa |
| Bulk Modulus [ K ] |
82.71 GPa |
| Elastic Coefficients |
C11=164MPa C12=53Mpa C44=33.7MPa |
| Apparent Elastic Limit |
36.54 MPa |
| Poisson Ratio |
0.26 |
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| Note: |
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| 1. |
More question and require please contact to our sales engineer. |
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| 2. |
Explain for crystal specification please click: |
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| 3. |
Download this crystal products catalogue please click: |
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