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Optical Surfaces Ltd.

Godstone Road
Kenley
Surrey
CR85AA
United Kingdom

Tel: +44 208 6686126

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Elliptical Optical Flats & Coated Flat Mirrors

Elliptical Optical Flats & Coated Flat Mirrors

Product News Thursday, October 27, 2022: Optical Surfaces Ltd.

Optical Surfaces Ltd. is a leading manufacturer of large, high precision optical flats and coated flat mirrors including a range of non-circular shapes such as elliptical and octagonal.
 
When the maximum possible clear aperture is required in a folded Newtonian or Cassegrain telescope design, the optical component of choice is an elliptically shaped coated flat mirror. Elliptical flat mirrors are used to fold and re-direct optical beams. Due to the elliptical geometry of the coated substrate, the aperture of a circular beam can be rotated by 45° around the minor axis without truncation.
  Manufactured from highly stable optical materials such as Zerodur® or ClearCeram®-Z, Optical Surfaces talented optical engineers can regularly achieve surface accuracies of better than ?/10 peak to valley on elliptical optical flats up to 600mm length (long axis).   The most common coating on optical flats is aluminium which offers reasonable reflectivity in the UV, visible and mid-infrared spectral wavebands. Protected silver coatings provides the highest reflectivity for coated flat mirrors operating in the visible and protected gold is the most efficient coating for infrared applications.   Optical Surfaces Ltd. has for over 50 years, supplied uncoated optical flats, and coated flat mirrors to renowned astronomy and defence groups worldwide. The company’s unique thermally stable production environment has made them pre-eminent in applications requiring optical flats and coated flat mirrors. All optical flats from Optical Surfaces Ltd. come with full quality testing assurance. Optics up to 600 mm diameter are provided with a Fizeau interferometric test report, larger flats are quality assured using the Ritchey-Common test procedure.   For further information please visit www.optisurf.com/index.php/products/flats-and-windows/flats/ or contact Optical Surfaces Ltd. on +44-208-668-6126 or sales@optisurf.com. Image Caption:  Light weighted elliptical flat mirror (courtesy: Optical Surfaces Ltd.) ----------- Worldwide HQ Optical Surfaces Ltd. Godstone Road Kenley Surrey CR8 5AA UK tel. +44-208-668-6126 email sales@optisurf.com web www.optisurf.com     Media Contact:    Dr Bill Bradbury        Primetek Solutions       info@primetek-solutions.com
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