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SILICON
Silicon crystals are ideal for IR applications with good transmittance from 1.2 to 7.0μm. Silicon has a low 2.329 g/cm3 density which is half the density of Germanium, making it ideal for weight sensitive applications. Silicon's price is much better compared with Germanium. Many military brand company choose our Silicon lens or windows.
There are two kinds of Monocrystalline Silicon lenses: Transmission Grade and Mirror Grade.
As the transmission of optical grade material pulling of monocrystalline silicon (OCZ-Si) are widely used in the mid-infrared (1-6um) band, infrared transmittance over 50%. Float zone silicon crystal can be used in a wider band (1-14 um), the area of the high purity fused silicon (HPFZ - Si) and even can be used in the infrared wave band (greater than 30 um). Monocrystalline silicon is a good laser reflector material. With its good thermal conductivity, excellent thermal stability, low thermal expansion coefficient, monocrystalline silicon relatively low density, low cost, easy to precision machining, the CO2 laser reflector is the preferred basement materials.
We can provide deep ultraviolet ( excimer level ), ultraviolet and infrared level calcium fluoride materials and components.
Orientation: <111>, <110>, <100>, etc.
Shapes: round rod, square plate, step, prism, wedge and so on.
Ideal for 1.2 to 7 μm NIR applications
Broadband 3 to 12 μm anti-reflection coating
Ideal for weight sensitive applications
Crystal Type | Cubic, NaCl type structure
Transmission Range: 1.2-15μm; 17…>500μm
Refractive Index: 3.41776@ 10μm
Reflective Loss: 46.1% @ 10μm
Density: 2.3291g/cm3
Melting Point: 1414℃
Molecular Weight: 28.09
Thermal Conductivity: 163.32 W/(m K)@40℃
Specific Heat: 703.4J/(kg K)
Hardness (mohs): 1150(Mohs 7)
Young’s Modulus: 131GPa
Shear Modulus: 79.9GPa
Bulk Modulus: 102GPa
Rupture Modulus: 125MPa
Dielectric Constant: 13@f=9.37GHz
Solubility Water: insoluble
Crystal Structure: Single crystal, synthetic
Cleavage Planes: (111)
Standard Diameter: 3", max. ø 300 mm
Application: windows,lenses,band pass filter, thermography, ATR crystals, FIR optics, mirrors
Our highly recommended Silicon Optics:
Prime/Test/Dummy Grade 2"/4"/6"/8"/12" Si wafers;
Small (D3-7mm) Si lens;
Aspherical Si lens;
Big (D>100mm) Si Windows with AL+DLC coating.