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Product Announcement

Knight Optical's λ/10 Mirrors for Government Testing for Aerospace

17 Oct 2019

Knight Optical can offer you stock and custom λ/10  mirrors for use in government testing for aerospace, in a range of materials such as BK7 or equivalent, Zerodur, Quartz, UV Fused Silica and many more. 

Mirrors are made from low expansion glass for optimum stability to maintain the lambda/10 flatness. The mirrors help produce high quality images and can be coated with a variety of coatings to ensure that the perfect quality image in the wavelength you require is achieved:

  • Enhanced aluminium 94%R for visible applications.
  • 9% dielectric for laser use in visible applications.
  • UV aluminium for UV applications down to 180nm.
  • 5% dielectric for laser use in the NIR applications.
  • Ion plated silver for NIR-2000nm applications.
  • Protected gold for 750nm to far infra-red applications

Capabilities - Plane mirror-front surface

λ/10  mirrors are used in the aerospace environment due to the vibration, temperatures and pressure through which they are exposed. The higher flatness means that the operator of the equipment has higher control over the signal quality being produced by the mirror, resulting in a higher quality imaging.

Knight Optical can provide λ/10  mirrors on a convex, concave and plano surface either from stock or custom. Send over the details of your requirement and we can see how we can help.

Typical specs for Plane λ/10  stock items held:


Soda lime float glass


+0 / -0.2 mm




+0.1 / -0.2mm

Surface quality:



λ/10 over 90% of mirror aperture (Rear is commercial polish)

All our λ/10  mirrors are checked for quality in our state-of-the-art Metrology laboratory using our Fisba Interferometer, Starret AV300 Video Imaging Device and Zygo Verifire XPZ Interferometer System, allowing 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 λ/10  Mirrors and superior service can improve your instrumentation and supply chain experience.

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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