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Reference Flats up to 600 mm in Diameter

May 2008
Optical Surfaces Ltd.Request Info
• surface roughness 10 Å rms
• surface accuracy l/20
• quality testing assurance

In a thermally stable manufacturing environment, Optical Surfaces Ltd. fabricates 600-mm-diameter reference flats with a surface accuracy of λ/20 peak to valley and surface roughness of 10 Å rms. The company works with high-stability materials such as glass, Zerodur and silica, and all of its reference flats are supplied with full quality testing assurance. Optics of up to 450-mm diameters are provided with a Fizeau interferometric test report, and the quality of larger flats is assured via the Ritchey-Common test procedure.

The reference flats are versatile devices 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, inspection of gauge blocks for wear and accuracy, and interferometric flatness testing of prisms, filters and optical windows.

The company can accommodate single specialist requirements to OEM quantities in sizes from 105 to 600 mm.


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astronomyBasic ScienceEuropeindustrialOptical Surfaces Ltd.Product Previewsurface flatnessZerodur and silica

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