Optical Surfaces is a supplier of high-precision reference and transmission flats to research organisations and national standards laboratories.
Transmission flats are used when measuring the surface quality or transmitted wavefront of flat surfaces or optics.
Reference flats are used for measuring surface flatness of polished areas by determining the variations between work surfaces and the surface of the optical flat.
Uses include high-precision applications in astronomy, laser beam steering, inspecting gauge blocks for wear and accuracy and interferometric flatness testing of prisms, filters and optical windows.
Optical Surfaces works with high-stability materials such as glass, Zerodur and silica.
It is able to routinely achieve a surface accuracy of lambda/20pv and surface roughness of 10A rms on reference and transmission flats up to 600mm (24in) in diameter.
All reference flats from Optical Surfaces come with full quality testing assurance.
Flats up to 450mm (18in) diameter are provided with a Fizeau interferometric test report, larger flats are quality assured using the Ritchey-Common test procedure.
