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

N-BK7 Windows for use in Thermal Imaging Cameras

3rd May 2019

Knight Optical offer a range of Stock N-BK7 Precision Grade Windows, for use with Thermal Imagining Cameras.

Infrared radiation is characterised by the wavelengths ranging from 750nm to 1000µm. Although typically used for the visible range, N-BK7 does have transmission within the near infrared spectrum also. Where IR materials such as Germanium are limited to a small band in the IR spectrum, N-BK7 works well throughout the entire visible and into the NIR, making it a perfect material for a protective window for using within a Thermal Imaging Camera. A low cost material, it is perfect substrate for your protective window.

We can supply both stock and custom N-BK7 windows to protect your thermal imaging application. The high optical quality and uniform transmission of N-BK7 as well as low absorption in the entire visible wavelength range is a key feature for this application. Virtually free of bubbles and inclusions as well as being very clear and almost colourless in appearance allows of windows in this material to act in both a protective position as well as to seal the enclosure to protect the inside components of the system.

We hold a large inventory of N-BK7 Windows.

·         Stock sizes from 10mm to 75mm diameter as well as square and rectangular shapes.

·         Custom sizes available on quotation.

·         Different coating options to suit your needs

Typical specs:

Material:                                             N-BK7 or Equivalent

Diameter Tolerance:                         +0.0/-0.15mm

Length/Width Tolerance:                ±0.1mm
Thickness Tolerance:                       ±0.1mm
Flatness:                                            >λ/4 over 90% aperture

Surface Quality:                              <40/20 Scratch/Dig
Parallelism:                                      1 arc minute
Coating:                                            Windows with the suffix “AV2” are coated on both faces with our extended broadband multilayer antireflective coating <0.5%@450-900nm

All our N-BK7 Windows are fully inspected on their quality in our ISO 9001:2015 certified, state-of-the-art Metrology laboratory, with our Trioptics, Optispheric, Varian and Starrett AV300. This allows us to work to the highest QA standards and meet the tolerance specifications on these precision components.

Contact our technical sales team to discover how Knight Optical’s high quality N-BK7 Windows and superior service can improve your instrumentation and supply chain experience.

UK, Europe, Asia & RoW: E-Mail [email protected]  Tel +44 (0)1622 859444

USA & Canada: E-Mail [email protected] Tel +001 401-583-7846

·         View our QA and metrology information

·         Watch our Corporate Video

·         View Our Corporate Brochure