High Precision Reference Flats

A thermally stable manufacturing environment enables Optical Surface to routinely achieve a surface accuracy of lambda/30 p.v. and surface roughness of 10 A rms in individual reference flats up to 600 mm in diameter. All reference flats from the company come with full quality testing assurance. Optica up to 450 mm diameter are provided with a Fizeau interferometric test report, larger flats are quality assured using the Ritchey-Common test procedure. The company works with high stability materials including glass, Zerodur and silica.