Categories | Infrared Window |
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Brand Name: | Wuhan Siwer Optics |
Place of Origin: | Wuhan,China |
MOQ: | 5 pieces |
Price: | 20-98USD/piece |
Payment Terms: | T/T, Western Union |
Supply Ability: | 1000 pieces/month |
Delivery Time: | 3-5 weeks |
Packaging Details: | 1.Tissue paper. 2.Plastic foam packaging film. 3.Hard carton box with quakeproof filler |
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: | Infrared system |
Calcium Fluoride (CaF₂) is commonly used for optics looking at the IR and UV spectrums and has a very low change in refractive index with wavelength.
Our CaF2 window is selected by many flame detector manufacturers, and we keep long-term cooperation. According to the design requirements of each customer, we continuously supply windows of different specifications.
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
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