CaF2
CaF2
CaF2 is a crystal which has good transmission from 170nm to 7800nm, It is slightly soluble in water and is susceptible to thermal shock Common uses of CaF2 includes IR components such as windows, lenses and prisms.
Specification
| Material: Anisotropic synthetic sapphire crystal (Al2O3) Orientation: Random Diameter Tolerance: +0.0, -0.1mm Thickness Tolerance: : +/- 0.2mm Clear Aaperture: >80% Parallelism: 1 arc minutes Surface Quality: 80-50 scratch and dig Flatness: λ\2 at 632.8 nm Protective Bevel |  |
Part No | Diameter(mm) | T (mm) |
WIN1240 | 12.7 | 2.0 |
WIN2540 | 25.4 | 3.0 |
WIN5040 | 50.0 | 3.0 |
Other sizes and coating are available upon requirements
Properties of CaF2 crystal
| Formula | CaF2 | ||||
| Max size | φ180mm | ||||
| Transmission scope (um) | 0.15-9.0 | ||||
| Density (g/cm3) | 3.18 | ||||
| Melting point (℃) | 1418 | ||||
| Mohs hardness | 4 | ||||
| Thermal expansion (10-6/K) | 16.2-19.4 | ||||
| Thermal conductivity | 9.17 | ||||
| Dissolution (g/cm3) | 0.0016 | ||||
| Wavelength (um) | 0.2 | 1.5 | 1.0 | 5.0 | 10.0 |
| Refractive Index | 1.4951 | 1.4365 | 1.4289 | 1.3990 | 1.3002 |
| Absorption coefficient (cm-1) | 0.10@0.2um;0.01@0.4um;0.03@2.7um | ||||