Low Dispersion, Low B-Integral CaF2 Vacuum Windows. Calcium fluoride features a very low spectral dispersion, a low non-linear refractive index.
Calcium fluoride shows good optical and thermo-mechanical properties. It is widely used as optical windows, lenses and prisms in 0.13μm~9.0μm. For its optical isotropy, low absorption and low refractive index. CaF2 has found unique advantages in high power laser and UV laser optics.
| Main Properties and Performance | |
| Transmission range (μm) | 0.13~9.0 |
| Transmittance | >90% (0.3~7μm,3mm) |
| Refractivity(5μm) | 1.39908 |
| Expansion Coefficient (°C-1) | 18.85×10-6 |
| Knoop hardness (kg/mm2) | 158.3(100) |
| Elastic Coefficients | C11=164;C12=53;C44=33.7 |
| Young’s modulus (GPa) | 75.79 |
| Poisson’s ratio | 0.28 |
| Solubility (g/100gH2O·20°C) | 0.0017 |
| Cleavage plane | (111) |
| Density(g/cm3) | 3.18 |
| Melting Point(°C) | 1360 |
Refractive Index of CaF2, Calcium Fluoride
Calcium fluoride is the inorganic compound with the formula CaF2. It is commonly used as a window material for both infrared and ultraviolet wavelengths, since it is transparent in these regions.
a low non-linear refractive index of Calcium Fluoride, Caf2
For a typical sample of CaF2 the refractive index and extinction coefficient at 632.8 nm are 1.433 and 0.000. Below are files of complete refractive index and extinction coefficients.
Low Dispersion, Low B-Integral CaF2 Vacuum Windows. Calcium fluoride features a very low spectral dispersion, a low non-linear refractive index.
Caf2 Index, Calcium Fluoride index, Caf2 refractive index, Calcium Fluoride refractive index