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Silicon Blanks
Silicon is grown by CZ or FZ method, it is a cost-effective material suitable for mid-wave infrared. It is commonly used to process lenses, windows, mirrors and silicon wafers.
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Nd data for different wavelength

Optical Properties
Transmission Range 52.5%@3-5um
Refractive Index 3.42@ 4μm
Reflective Loss 46.1% @ 10μm

Thermal Properties
Melting poimt 1410℃
Thermal Expansion 3.9ⅹ10 −6 /℃@ 200-300 K<111>
Thermal Conductivity 163.32 W/(m K)@40℃
Specific Heat 703.4J/(kg K)


Highly Recommended Silicon from Yutai Optics:
IR Silicon
Optical Plano Silicon Windows
Optical Spherical Silicon Lenses
Optical Aspheric Silicon Lenses
Silicon Right Angle Prisms
Silicon IR Longpass Filters
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