Crystals Materials
Calcium Fluoride (CaF2) used for laser beam collimation and serves as a substrate for various optical components
Calcium fluoride (CaF2) material offers a wide transmission spectrum range (180nm-8.0μm), high damage threshold, low fluorescence, and high homogeneity. It has relatively soft physical properties, making its surface prone to scratching. It is commonly used for laser beam collimation and serves as a substrate for various optical components.
| Material | Calcium Fluoride (CaF2) |
| Diameter | 3mm ~ 300mm |
| Thickness | >0.1mm |
| Dimension Tolerance | +0/-0.02mm |
| Angle Tolerance | ±15 arcsec |
| Surface Accuracy | λ/10 @ 633nm |
| Surface Quality S/D | 10–5 |
| Pyramid Tolerance | <5 arcmin |
| Bevel | <0.25mm X 45° |
| Coating | Available upon request |
| Crystal Structure | Cubic |
| Density | 5.27 g/cm³ |
| Crystal Size | <100 μm |
| Impurities | None > 0.05 mm |
| Resistivity | > 10^12 ohm-cm |
| Dielectric Constant | Consult Technical Personnel |
| Absorption Coefficient @10.6μm | <0.0005 cm^-1 |
| Thermal Optical Coefficient (dn/dT) @10.6μm | 6.1 × 10^-5 ℃ |
| Refractive Index Uniformity @0.6328μm | <3 × 10^-6 |
| Thermal Conductivity @20°C | 0.18 W/cm/℃ |
| Specific Heat | 0.356 J/g/℃ |
| Linear Expansion Coefficient @20°C | 7.57 × 10^-6/℃ |
| Young's Modulus | 67.2 GPa (9.75 × 10^6 psi) |
| Fracture Modulus | 55.1 MPa (8,000 psi) |
| Knoop Hardness | 105-120 kg/mm² |
| Poisson's Ratio | 0.28 |
| Fracture Toughness | 0.5 × 10^6 N/m^3/2 |
Stock specification list
If need other specifications and quantities products, please contact us(sales@aogcrystal.com).
Anti-reflection coatings are available at your specified wavelength.
Be sure to wear laser safety goggles when checking optical path and adjusting optical axis.
To inquiry or order a finished Calcium Fluoride (CaF2) windows, please specify the specification listed above, for common application, we only need to know the main specification: Cr-dopant concentration, sizes, and coating. For
special request, please specify specification in details for evaluation and fabrication.
| Part Number | Face size | Thickness | Surface Quality | Coating |
|---|---|---|---|---|
| WIN-080-020-CaF2 | Dia 8.00 mm | 2.00 mm | 40/20 | UnCoated |
| WIN-127-020-CaF2 | Dia 12.70 mm | 2.00 mm | 40/20 | UnCoated |
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