Potassium Bromide (KBr)

Potassium Bromide is used for windows and prisms when transmission to 26µm is desired. Potassium Bromide is water soluble and must be protected against moisture degradation of polished surfaces.

The material cleaves readily, and can be used at temperatures up to 300°C. UV irradiation of Potassium Bromide produces color centers.

 

Property Specification
Transmission Range 0.23µm to 25µm
Density 2.75451
gm/cm3
Thermal Expansion 43 x 10-6 /°C
Surface Finish Generally 60-40 or 80-50 scratch-dig in the Infrared.
Surface Figure Generally λ/20 @ 10.6µm
AR Coating Options Moisture Protection (Specify Wavelength of Use).
Typical Applications IR Spectroscopic components, beamsplitters, CO2 lasers.
Products Manufactured Windows, Lenses, Lens Protectors, Wedges, Aspheric Lenses.

 

Wavelength (µm)
Index of Refraction (n)
2.440
1.537

4.258
1.535
6.692
1.532
8.662
1.529
9.724
1.527
11.862
1.522
14.290
1.515
17.400
1.504
18.160
1.501
21.180
1.487