Silicon (Si)
Lightweight infrared semiconductor with good thermal conductivity, transmissive through the NIR and MWIR. Used for imaging windows, mirror substrates, and weight-critical IR optics.
Flat optics material
Typical properties
- Transmission range
- 1.2 – 9 µm
- Refractive index
- 3.4223 @ 5.0 µm
- Knoop hardness
- 1150 kg/mm²
- Density
- 2.33 g/cm³
- Thermal expansion (CTE)
- 2.6 × 10⁻⁶ /K
- Thermal conductivity
- 163 W/m·K
Published values for this material class, given to help you shortlist a substrate. They are not lot-specific guarantees. Request the SPEKTON datasheet for certified figures against your specification.
Download Technical Datasheet (PDF)Datasheet referenced from Crystran.
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