| Place of Origin: | Wuhan,China |
|---|---|
| Brand Name: | Wuhan Siwer Optics |
| Minimum Order Quantity: | 5 pieces |
| Price: | 20-98USD/piece |
| Packaging Details: | 1.Tissue paper. 2.Plastic foam packaging film. 3.Hard carton box with quakeproof filler |
| Delivery Time: | 3-5 weeks |
| Payment Terms: | T/T, Western Union |
| Supply Ability: | 1000 pieces/month |
| Material: | Calcium Fluoride(CaF2) | Size Tolerance: | +/-0.1mm |
|---|---|---|---|
| Chamfer: | 0.2-0.5mm | Surface Quality: | 60/40 |
| Surface Flatness: | Lambda/4 In 25.4mm | Parallelism: | 0.01mm |
| Standard Coating: | Uncoated Or Customized | Size Range: | 3-120mm |
| Usage: | 192nm Analyzer | ||
| High Light: | optical window,infrared system protectd window |
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High purity single crystal CaF2 material has excellent transmittance in UV, but it still has a large absorption in the wavelength range below 200nm. In order to reduce the absorption of deep UV light by CaF2 window, we need to make the thickness of the window very thin.
CaF2 material is easy to be broken., which greatly increases the processing difficulty of ultra-thin CaF2 window. Siwer optics can produce large size and super thin CaF2 windows, and provide you with high quality customized services.
The thickness of CaF2 window with diameter less than 25.4mm can be 0.2mm
| Material | Calcium Fluoride |
| Diameter Tolerance | +0.0/-0.1 mm |
| Thickness Tolerance | ±0.1 mm |
| Parallelism | 1 arc min |
| Surface Quality | 60-40 Scratch-Dig |
| Surface Flatness (Plano Side) |
λ/2 at 633nm |
| Surface Irregularity (Peak to Valley) |
λ/2 at 633nm |
| Clear Aperture | 90% |
| Chemical Formula | CaF2 |
| Crystal Class | Cubic, cleaves [111] plane |
| Lattice Constant, Å | 5.46 |
| Density, g/cm3 (20 °C) | 3.18 |
| Molecular Weight | 78.08 |
| Reflection Loss | 5.4% at 5 μm |
| Absorption Coefficient | 7.8 x 10-4 cm-1 @ 2.7 μm |
| Dielectric Constant for 105 Hz | 6.76 |
| Melting Temperature, K | 1630 |
| Thermal Conductivity, W/(m K) at 273 K | 10 |
| Thermal Expansion, 1/K at 300 K | 18.9 x 10-6 |
| Specific Heat, cal/(g K) at 273 K | 0.204 |
| Debye Temperature, K | 510 |
| Young's Modulus, GPa | 75.79 |
| Rupture Modulus, GPa | 0.0365 |
| Shear Modulus, GPa | 33.76 |
| Bulk Modulus, GPa | 83.03 |
| Poisson's Ratio | 0.28 |
| Knoop Hardness, kg/mm2 | 178 [100], 160 [110] |
Production process