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Description

Potassium Bromide (KBr) windows are high-performance optical components widely used in infrared (IR) spectroscopy and opticalsystems. Featuring a broad transparent range in the mid-to-far IR spectrum, they deliver excellent transmittance with minimaloptical absorption, ensuring clear signal detection for IR analysis.With high chemical stability (excluding moisture sensitivity) and low refractive index dispersion, KBr windows offer superior optical homogeneity and flatness, avoiding unwanted light scattering or distortion. Machined with precision polishing, they provide smooth optical surfaces for optimal beam transmission, and are compatible with standard mounting designs for easy integration into spectrometers, FTIR systems and IR imaging setups.

Factory Custom Optical Potassium Bromide KBr Windows for Infrared Imaging Systems and IR Laser Optical Setups

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Specifications

Substrate Material: KBr
Diameter (or Largest Dimension): 25 mm
Thickness: 3 mm
Antireflection Coating: Uncoated
Surface Quality (Scratch-Dig): 60-40
Surface Flatness: <= Lambda/4

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Features

  • High-purity single-crystal material: Low absorption, low scatter, and excellent optical homogeneity.Low refractive index: n ≈ 1.55 at 10.6 µm, reducing surface reflection without coating
  • Easy cleaving and polishing: Suitable for thin windows and custom-shaped optical components
  • Good mechanical workability: Can be cut, polished, and shaped into various sizes and thicknesses
  • Standard and custom dimensions: Diameters from 5 mm to 100 mm, thicknesses from 1 mm to 10 mm available

Applications

  • FTIR & infrared spectroscopy: Sample compartments, gas cells, and spectrometer optical windows
  • Infrared gas analysis: Monitoring CO₂, methane, VOCs, and industrial emissions
  • Medical diagnostics: Infrared spectroscopy for bio-sample and liquid analysis
  • Laser systems: Windows for CO₂ lasers (10.6 µm) and low-power infrared laser paths
  • Thermal imaging systems: Protective windows for LWIR thermal cameras
  • Industrial process monitoring: Infrared optical windows for chemical and manufacturing processes
  • Scientific research: Mid-infrared and far-infrared optical experiments

Frequently Asked Questions

What is the transmission range of KBr windows?
KBr windows transmit from 0.25 µm to 25 µm, covering the entire mid and far infrared region.
Is KBr window suitable for outdoor use?
Not recommended for long-term outdoor use due to hygroscopicity; use sealed housings if needed.
Why is KBr the most common window for FTIR?
It has excellent transmission across the molecular fingerprint region and low cost.

Got more questions? Use the inquiry form to ask the supplier directly.

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