Spinel (MgAl2O4)
Polycrystalline transparent ceramic with sapphire-class hardness and broadband transmission from the visible into the MWIR. Chosen when one aperture has to serve several bands at once.
Flat optics material
Typical properties
- Transmission range
- 0.2 – 5.5 µm
- Refractive index
- 1.70 @ 1.0 µm
- Knoop hardness
- ~1400 kg/mm²
- Density
- 3.58 g/cm³
- Thermal expansion (CTE)
- 5.9 × 10⁻⁶ /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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