KRS-5 optical component KRS-5N

KRS-5 (Thallium Bromide-Iodide) is used for transmission in the visible and IR spectrums. The material has relatively low absorption in the Mid-IR range, a wide transparency, a low solubility in water and a comparatively high refractive index making it desirable in internal reflection components. KRS-5 has a tendency to cold flow over time. KRS 5 is used primarily for Attenuated Total Reflection (ATR) prisms in IR spectroscopy and as IR windows and lenses. Examples of KRS-5 applications include transmission windows for gas and liquid sample cells in Fourier Transform Infra-Red (FTIR) spectrophotometers. KRS-5 has a broad transmittance of 0.6 - 40µm, peaking at over 68% between 2-25μm, and has a hardness of HK40. It is used as a substrate for infra-red holographic polarizers. The refractive index varies from about 2.68 at 0.6µm to about 2.2 at 40µm. The soft surface requires a coating to prevent the crystal from being scratched and dissolved by water. Thallium Bromine-Iodide is considered toxic and must be handled with extreme care. Knight Optical supply a range of quality KRS 5N optical components including KRS 5N windows, KRS 5N prisms, and KRS 5N blanks either from stock or bespoke custom made to your specification for a range of applications. Every component is individually tested by our highly skilled technicians in our state of the art metrology lab to ensure all components meet our high quality standards.