Knight Optical

(001)401-583-7846 https://www.knightoptical.com

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L/10 Mirrors for Spectrometers

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

As well as large flat mirrors and large spherical mirrors to high spec.

Mirrors are made from low expansion glass for optimum stability to maintain the lambda/10 flatness. The mirrors help produce high quality signals 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.
  • 99.9% dielectric for laser use in visible applications.
  • UV aluminium for UV applications down to 180nm.
  • 98.5% dielectric for laser use in the NIR applications.
  • Ion plated silver for NIR-2000nm applications.
  • Protected gold for 750nm to far infra-red applications


Lambda/10 mirrors are used to produce a better quality signal from the mirror, resulting in a higher quality result for transmission.

Knight Optical can provide lambda/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 lambda/10 stock items held:

Material: Soda lime float glass
Diameter: 0 / -0.2 mm
Length/width: ±0.1mm
Thickness: 0.1 / -0.2mm
Surface quality: <40:20 scratch/dig
Flatness: λ/10 over 90% of mirror aperture (Rear is commercial polish)

All our lambda/10 mirrors are checked for quality in our state-of-the-art Metrology laboratory using our Fisba Interferometer, Starrett 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.

l10front mirrors



Contact our technical sales team to discover how Knight Optical’s high quality L/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

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