Calcium Fluoride (CaF2)
Low-index crystal with broadband transmission from the deep UV into the MWIR and very low dispersion. Standard for excimer laser optics, UV windows, and achromatic lens designs.
Flat optics material
Typical properties
- Transmission range
- 0.13 – 10 µm
- Refractive index
- 1.399 @ 5.0 µm
- Knoop hardness
- 158 kg/mm²
- Density
- 3.18 g/cm³
- Thermal expansion (CTE)
- 18.85 × 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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