Silicon
Silicon Aspheric Lenses
Silicon Aspheric Lenses for compact NIR/SWIR imaging, with Silicon material, custom size review, and coating options.
silicon-aspheric-lenses
Silicon (Si)
Silicon (Si) optical material for NIR/SWIR sensing and compact IR optics, with selection guidance for custom windows and lenses.
Key Properties
Transmission Range: 1.2 - 7 µm
Refractive Index: 3.41776 at 10 μm
Density: 2.33 g/cm3
Knoop Hardness: 1100 kg/mm2
About Silicon (Si)
Overview
Silicon (Si) is used for NIR/SWIR sensing and compact IR optics where a robust substrate and a high refractive index are useful to the optical layout. It is commonly reviewed for custom windows, lenses, and compact assemblies.
Key Material Properties
| Parameter | Guidance |
|---|---|
| Transmission Range | 1.2-7 μm |
| Refractive Index | 3.41776 at 10 μm |
| Density | 2.33 g/cm3 |
| Knoop Hardness | 1100 kg/mm2 |
| Young's Modulus | 130.91 GPa |
| Thermal Expansion | 2.6*10^-6/K @293 K |
Typical Applications
- NIR windows
- IR lenses
- Rugged sensing optics
- Thermal optical systems
- Cost-sensitive IR assemblies
Selection Guidance
Confirm the operating band, coating target, and package layout because silicon is not a universal broadband IR material. Use the values on this page as engineering selection guidance, then confirm final tolerances and inspection requirements against the production drawing.
Request Material Review
Use the contact form or email [email protected] with wavelength band, size, quantity, coating target, and application notes for a practical material review.
Material Properties
Material
Silicon (Si)
Transmission Range
1.2-7 μm
Refractive Index
3.41776 at 10 μm
Density
2.33 g/cm3
Knoop Hardness
1100 kg/mm2
Young's Modulus
130.91 GPa
Thermal Expansion
2.6*10^-6/K @293 K
Common Applications
NIR windowsIR lensesRugged sensing opticsThermal optical systemsCost-sensitive IR assemblies
Silicon (Si) Products
Silicon
Silicon Optics
Silicon Optics for NIR/SWIR imaging, with Silicon material, custom size review, and coating options.
silicon-general-optics
Silicon
Silicon Plano-Convex Lenses
Silicon plano-convex lenses for 1.2-8 um infrared systems, including uncoated and 3-5 um AR-coated options for MWIR applications.
silicon-plano-convex-lenses
Silicon
Silicon Windows
Silicon Windows for NIR/SWIR sensor protection and compact infrared assemblies, with Silicon material, custom size review, and coating options.
silicon-windows