Silicon Window
What is
Silicon Window
?
Silicon Window
In the 3-5um range, silicon is the most common material for making optical lenses and optical Windows in efficient infrared imaging systems. Silicon has a high refractive index (about 3.4 in the 3-5um band), minimal surface curvature and small color difference, and in low-power imaging systems, usually no trimming is required. Silicon Windows are mainly used in national defense weapons, thermal imagers, infrared thermometers, night vision, satellites and so on.
Specifications
Material | Silicon |
|---|---|
Size | 1-300mm |
Tolerance | +/-0.02mm |
Parallelism | <3 arc sec |
Flatness | 1/10 lambda |
Coating | AR BBAR HR |
Silicon Material Certificate
Purity | >99.999% |
|---|---|
Crystal Growth | CZ |
Conduction Type | P Type or N type |
Crystal Orientation | <100> or <111> |
Resistivity | 1-100 ohm.cm |
Lattice Constant | 5.42×10 -10 m |
Dislocation Density | None |
CLTE | （2～9）×10 -6 K-1 |
transmittance@3-5µm | 50%-52.5% |
Density | 2.33g/cm3 |
Hardness, Mohs | 7 |
Dielectric Constant for 9.37 x 109Hz | 13 |
Melting point, °C | 1414 |
Thermal Conductivity, W/m·K at 313 K | 163 |
Thermal Expansion, 1/K at 293 K | 2.6x10-6 |
Specific Heat Capacity, J(kg·°C) | 712.8 |
Bandgap, eV | 1.1 |
Knoop Hardness, kg/mm2 | 1100 |
Young's Modulus, Gpa | 130.91 |
Shear Modulus, Gpa | 79.92 |
Bulk Modulus, Gpa | 101.97 |
Debye Temperature, K | 640 |
Poisson's Ratio | 0.28 |
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