2
Knight Optical can offer Potassium Bromide (KBr) Optics for Infra-red systems over the waveband of 0.23 to 23µm. We offer KBr optics for UV, visible, NIR (0.7-1.5), MWIR (3 to 5µm), and LWIR (8 to 24µm) Imaging Systems. KBr has a good transmission in the MWIR and LWIR bands, and can be used with Silicon, Germanium, or Zinc Selenide to form well corrected optical devices. KBr’s refractive index range is lower than the three given examples , and well placed to form corrected doublets and lens systems with them. These systems include, for example, Forward Looking Infra-Red (FLIR) systems, and thermography. KBr has a range of refractive indices from 1.5898 at 0.405µm, 1.5441 at 1.014µm, 1.5329 at 6.238µm, and at 1.4714 at 23.86µm. This crystal will produce a well corrected lens system using other IR glasses, such as Silicon, Zinc Selenide, Calcium Fluoride, or Germanium. The figure shows an image of KBr as it would be used as the primary dispersion prism in an Fourier Transform Infra-Red (FTIR) spectroscope. The KBr prism will have a range from the UV to LWIR. The wavelength range is set by the transmission of the other elements, whilst the prism has a wider wavelength range. The input beam, which is collimated by a mirror, that comes from the scattered light of the sample is directed toward the dispersive prism. If the prism for the FTIR is a dispersive type, it fans the light beam out such that each wavelength has its own angle, then it is best for the apex angle to be between 60° and 72°. The output beams, which are focused by a mirror, as there is no wavelength dispersion to introduce errors compared to refraction from a lens, at a slit. The slit has the width that defines the wavelength bandwidth. Potassium Bromide (KBr) Optics for Infra- Red Systems

Potassium Bromide (KBr) Optics for Infra- Red Systems · Knight Optical can offer Potassium Bromide (KBr) Optics for Infra-red systems over the waveband of 0.23 to 23µm. We offer

  • Upload
    others

  • View
    1

  • Download
    0

Embed Size (px)

Citation preview

Page 1: Potassium Bromide (KBr) Optics for Infra- Red Systems · Knight Optical can offer Potassium Bromide (KBr) Optics for Infra-red systems over the waveband of 0.23 to 23µm. We offer

Knight Optical can offer Potassium Bromide (KBr) Optics for Infra-red systems over the waveband of 0.23 to 23µm. We offer KBr optics for UV, visible, NIR (0.7-1.5), MWIR (3 to 5µm), and LWIR (8 to 24µm) Imaging Systems. KBr has a good transmission in the MWIR and LWIR bands, and can be used with Silicon, Germanium, or Zinc Selenide to form well corrected optical devices. KBr’s refractive index range is lower than the three given examples , and well placed to form corrected doublets and lens systems with them.

These systems include, for example, Forward Looking Infra-Red (FLIR) systems, and thermography. KBr has a range of refractive indices from 1.5898 at 0.405µm, 1.5441 at 1.014µm, 1.5329 at 6.238µm, and at 1.4714 at 23.86µm. This crystal will produce a well corrected lens system using other IR glasses, such as Silicon, Zinc Selenide, Calcium Fluoride, or Germanium.

The figure shows an image of KBr as it would be used as the primary dispersion prism in an Fourier Transform Infra-Red (FTIR) spectroscope. The KBr prism will have a range from the UV to LWIR. The wavelength range is set by the transmission of the other elements, whilst the prism has a wider wavelength range.

The input beam, which is collimated by a mirror, that comes from the scattered light of the sample is directed toward the dispersive prism. If the prism for the FTIR is a dispersive type, it fans the light beam out such that each wavelength has its own angle, then it is best for the apex angle to be between 60° and 72°. The output beams, which are focused by a mirror, as there is no wavelength dispersion to introduce errors compared to refraction from a lens, at a slit. The slit has the width that defines the wavelength bandwidth.

Potassium Bromide (KBr) Optics for Infra-Red Systems

Page 2: Potassium Bromide (KBr) Optics for Infra- Red Systems · Knight Optical can offer Potassium Bromide (KBr) Optics for Infra-red systems over the waveband of 0.23 to 23µm. We offer

This is the fingerprint for the organic and in-organic material. By changing the prism, optical bandwidth (slit width), and detector, other wavelengths can be measured.

Contact our multilingual technical sales team and discover how Knight Optical’s high quality Potassium Bromide optics and superior service can improve your instrumentation and supply chain experience. Tel +44 (0)1622 859 444

At this image plane is a linear detector, composed of many individual detection sites. Each wavelength is detected by its relative position in the image plane, and this is electronically processed to provide a display of intensity versus wavelength as is dispersed by the prism.

Each angle is at a wavelength that corresponds to particular mineral and thus the unique composition of the sample is determined. As the information is obtained using a slit and linear detector, the best results are obtained when at least pixels (detectors) cover the wavelength bandwidth defined by the input slit..

Potassium Bromide (KBr) Optics for Infra-Red Systems