Calcium Fluoride
Manufactured through the Brigman-Stockbarger-Process: Polycrystalline calcium fluoride is molten inside a crucible. On one side of the crucible, a seed crystal is placed and the solidification process is iniciated. Because of the seed crystal, the glass solidifies in a crystalline structure
- Transmission range: 0.2 - 6 µm
- Softer and therefore thicker than other glasses in some cases
- Parallelism: 3 arcminutes
- Planarity: 2 wavelengths at 633 nm
- Surface quality: 40/20
- Bakeable up to 200 °C (392 °F)