Calcium Fluoride (CaF2)
Calcium Fluoride (CaF2)
Calcium fluoride (CaF2) crystals have the advantages of wide light transmission range (good light transmission performance in the wavelength range of 0.13μm~10μm), low stress birefringence (no obvious intrinsic birefringence above 200nm), high uniform refractive index, stable mechanical properties, no delix, strong anti-radiation damage ability, etc. It is an ideal material for making all kinds of optical components such as optical Windows, prisms and lenses. Currently available CaF2 crystals have a diameter of 375mm.
| Main Performance Parameters | |
| Density | 3.18（g/cm3） |
| Melting Point | 1360℃ |
| Refractive Index | 1.39908 at 5mm |
| Solubility | 0.0017g/100cm（20℃∕H2O） |
| Transmittance Wavelength Range | 0.13~11.3mm |
| Knoop Hardness | 158.3（100） |
| Elastic Coefficient | C11=164、C12=53、C44=33.7 |
| Apparent Elastic Limit | 36.54MPa |
| Thermal Expansivity | 18.85×10-6∕ ℃ |
| Crystal Orientation | ±0.5o |
| Dimension（mm） | Substrates of special orientation and size can be customized according to customer requirements |
| Polishing | Single-sided or double-sided |
| Packaging | Class 100 clean bag, class 1000 super clean room |
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