Posted in | News

Large Diameter Spherical Mirrors

Optical Surfaces high precision, large diameter spherical mirrors are used in a widevariety of applications including Schlieren imaging, wind tunnels, observatory spectrographs, bubble chambers and to test hyperboloids (as Hindle spheres).

Benefiting from workshops and test facilities deep underground, where temperatures remain constant and vibration is practically non-existent, Optical Surfaces routinely produces high precision spherical mirrors in a wide range of materials and coatings.

Typical achievable surface accuracy is better than lambda/30 p-v, surface quality 10:5 scratch dig and micro roughness less than 1.2nm RMS.

A typical example of these capabilities is a 1.3-metre diameter spectrograph spherical mirror supplied to the Royal Greenwich Observatory (UK) that was installed on the 2.5-metre Isaac Newton Telescope located at La Palma in the Canary Islands. This spectrograph contributed to obtaining the first observable evidence of the existence of black holes.

For further information on high precision spherical mirrors please visit or contact Optical Surfaces Ltd. on +44-208-668-6126 / [email protected]  



Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Optical Surfaces Ltd.. (2019, October 21). Large Diameter Spherical Mirrors. AZoOptics. Retrieved on March 23, 2023 from

  • MLA

    Optical Surfaces Ltd.. "Large Diameter Spherical Mirrors". AZoOptics. 23 March 2023. <>.

  • Chicago

    Optical Surfaces Ltd.. "Large Diameter Spherical Mirrors". AZoOptics. (accessed March 23, 2023).

  • Harvard

    Optical Surfaces Ltd.. 2019. Large Diameter Spherical Mirrors. AZoOptics, viewed 23 March 2023,

Tell Us What You Think

Do you have a review, update or anything you would like to add to this news story?

Leave your feedback
Your comment type