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

BREXIT UPDATE: Knight Optical will continue to provide quality assured service for all your optical requirements both custom & stock. We will handle all requirements caused by the new regulations.


Looking For a Custom Optical Solution? Enquire

Custom Infrared Lenses

Infrared lenses have a multitude of uses in industries such as defence, aerospace, robotics, and automation.

Knight Optical have extensive knowledge and experience in providing our customers with precision custom infrared lenses. We offer cylindrical, planoconvex/concave and meniscus lenses, as well as achromatic doublets and aspheric options to reduce aberrations within the system, this includes diamond-turned aspheric lenses.

Available infrared materials include:

  • Germanium
  • Silicon
  • Zinc selenide/sulphide
  • Sapphire with transmission from UV to mid-infrared.
  • Fluoride materials such as Calcium Fluoride (CaF2), Barium Fluoride (BaF2), and Magnesium Fluoride (MgF2) which transmit from UV to IR.
  • AMTIR and other amorphous chalcogenide glass.

Further information on Knight Optical’s infrared materials can be found on our infrared optics page and includes the capabilities for each substrate.

Coatings can be applied including antireflective (AR) and diamond-like carbon (DLC) coatings for optimisation and durability. Coatings can target specific wavelength ranges including NIR, SWIR, MWIR, and LWIR regions, ideal for thermal imaging applications.

Our stock and custom infrared lenses come quality assured. Contact our technical sales team and discover how Knight Optical’s high quality IR lenses and service can improve your instrumentation and supply chain experience.

Additional Information

  • Materials such as sapphire and the fluorides are ideal for applications

Typical Applications

  • Thermal imaging (thermography) where germanium is an ideal material for lenses due to its transmission within the MWIR and LWIR thermal wavebands.
  • Zinc selenide lenses are often used in CO2 laser applications due to its transmission covering both the HeNe laser wavelength (632.8nm) and CO2 laser wavelength (10.6µm).

Our 2022/2023 Catalogue

Inside Knight Optical’s catalogue you’ll find details of the industries we serve as well as the many other services we can offer. It also showcases hundreds of our most popular products, supported by useful technical information, to help you choose the right part for your application.
Click below to view our digital catalogue now.

view our catalogue