Europe, UK, Asia & RoW: [email protected] +44 (0)1622 859444 | USA & Canada: [email protected] +1 401-583-7846

My Cart

Looking For a Custom Optical Solution? Enquire

Potassium Bromide (KBr) is a crystalline compound of potassium and bromide with a rock-salt type structure. It is used in optical applications in the UV, Visible, MWIR, and LWIR waveband regions. KBr has a melting point of 730°C and must be used in a moisture-free environment as the polished surfaces degrade in a moist atmosphere.

The IR grade of Potassium Bromide (KBr) can be used as the windows for Fourier Transform Infra-Red (FTIR) spectroscopy. The wavelength extends from 0.23 to 25µm with a high value of transmission. This transmission averages about 90% from 0.3 to 20µm.

Knight Optical supply quality custom-made infrared optics using Potassium Bromide to your specification. 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.

Please contact our multilingual technical sales team and discover how Knight Optical’s high quality AMTIR optical components and service can improve your instrumentation and supply chain experience.

Surface Quality:
Potassium Bromide
± 0.2mm
< 2 waves over 90% aperture
<60-40 scratch/dig
5 arcmin

Note: Stectroscopic Standard Grade come in drilled/undrilled versions for use alone or as a pair.

Mounting into cells.
Edging down to smaller sizes.

11 Items

Name Type Diameter (mm) Length (mm) Width (mm) Thickness (mm) Coating Drilled Material Price Buy
WKR2500 Standard 25 2 Uncoated Potassium Bromide
WKR1300 Standard 13 2 Uncoated Potassium Bromide
WKB5005 Standard 50 5 Uncoated Potassium Bromide
WKB4505 Standard 45 5 Uncoated Potassium Bromide
WKB4000 Standard 40 5 Uncoated Potassium Bromide
WKB3005 Standard 30 5 Uncoated Potassium Bromide
WKB2542 Spectroscopic Standard Grade 41 23 5 Uncoated Drilled Potassium Bromide
WKB2505 Standard 25 5 Uncoated Potassium Bromide
WKB2500 Standard 25 4 Uncoated Potassium Bromide
WKB2341 Spectroscopic Standard Grade 41 23 5 Uncoated Undrilled Potassium Bromide
WKB2002 Standard 20 2 Uncoated Potassium Bromide

11 Items


Potassium Bromide Windows

Shop By
Shopping Options
Diameter (mm)
Thickness (mm)