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Product Announcement

Knight Optical’s Infrared (IR) Interference Gas Band Filters

07 Apr 2022

Knight Optical – the leading supplier of metrology-tested, premium-quality optical components – is a renowned name amongst engineers and R&D specifiers working within the gas and utilities sectors. With a wide-ranging portfolio of Infrared (IR) Optics suitable for applications such as environmental monitoring, security and thermal imaging applications, Knight Optical's Infrared (IR) Interference Gas Band Filters are a firm favourite for many within the industry. 

A specific variety of Bandpass Filter, with project-specific purposes, our Infrared (IR) Interference Gas Band Filters can be used for the detection of a wide range of gases. What's more, we can supply these filters in a required centre wavelength (CWL) with a narrow bandwidth in the short-wave infrared (SWIR), mid wavelength infrared (MWIR) and long-wave infrared (LWIR) – ensuring every project's requirements are met, regardless of complexity. Due to the coating being deposited using energetic sputtering, this makes them very durable and resistant to harsh environmental conditions.  

At Knight Optical, we understand the importance of ultra-precision and the need for tailor-made solutions; particularly with regards to monitoring applications within the gas and utility sectors. It's for this reason that we offer our Infrared (IR) Interference Gas Band Filters as custom-made components for seamless integration with any device, regardless of size or requirements. This made-to-measure service allows you to specify the dimensions, substrates, tolerances and optical coatings – if required – that are best suited to your application.  

Now available UV

Typical specs:

Material: Fused Silica, Silicon, Germanium

Diameter and aperture (mm): 12.5mm ±0.1 (8.5mm aperture)

25.0mm ±0.1 (21mm aperture)

50.0mm ±0.1 (46mm aperture)

Thickness (mm): ≤6.1mm +0/-0.1

CWL tolerance (nm): ± 20% of FWHM

FWHM tolerance (nm): ± 20% of FWHM

Optimum operating temp: 23°C

Edge treatment: Mounted in a black anodised aluminium ring

Surface quality: 80/50 Per MIL-0-13830A

Usable temperature limits: -50°C to +80°C

Now available Optical Components for UVC Sterilisation and Disinfection

Quality you can rely on

Quality is at the core of Knight Optical, and to ensure you profit from high-precision optics, we take the utmost care to ensure every component accurately meets your specifications. Offering unparalleled service, Knight Optical undertakes a full inspection of your optics from our ISO 9001:2015-certified, state-of-the-art Metrology Laboratory, followed by a meticulous visual examination by our dedicated QA department. 

To discover how we can enhance your supply chain experience and to learn more about our custom-made Infrared (IR) Interference Gas Band Filters, contact a member of our technical sales team today. 

UK, Europe, Asia & RoW: E-mail info@knightoptical.co.uk 

Tel +44 (0)1622 859444

USA & Canada: E-mail usasales@knightoptical.com 

Tel +001 401-583-7846 

Knight Optical Ltd
Roebuck Business Park
ME17 1AB
United Kingdom
Tel: 44 (0)1622 859444
Fax: 44 (0)1622 859 555
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