ISP Optics grows Potassium Bromide (KBr) and Sodium Chloride (NaCl) crystals in-house by Kyropoulos technique. Typical sizes of large ingots are in diameters up to 7” by 4” in height. Potassium Bromide and Sodium Chloride crystals have Cubic syngony and perfect cleavability along (100) crystallographic axis which aids in the initial stages of fabrication process.
Potassium Bromide (KBr) and Sodium Chloride (NaCl) are unique crystalline materials for their wide transmission range (from 0.25 to 25 microns) with no significant optical absorption lines. Even uncoated optical elements transmit over 90%.
Applications for KBr material is standard component used in IR spectrophotometers, like beamsplitters, as well as the gas and liquid sample cell windows for FTIR application.
KBr material has attractive aspects due to its unique optical properties which it's propelling design and manufacture of KBr lenses targeted for broad band imaging applications. IR lens assemblies designed with KBr material provide compatibility with multispectral sensors.
Comparison of KBr Coatings
Another advantage that we have to offer is proprietary KBr coating designs to protect this hygroscopic material against moisture degradation which not only maintains the transmission of the uncoated KBr but also enhances it.