Radius of curvature and sphericity calibration service

Measurements that are directly traceable to national standards

The departure of the surface under test from a best-fitting spherical surface, presentable by graphical illustrations, provides a valuable assurance of the quality of a manufactured spherical surface. This enables detection of  both aspherical anomalies and astigmatism, and enables accurate production of items such as isometric reference lenses:

• measurement of radius gauges traceable to national standards
• certified range for radius of curvature (ROC) from 5 mm to 1000 mm
• best measurement capability of 0.002 mm ROC and 33 nm departure from sphericity
• 3D plot of sphericity available
• measurements possible on most polished surfaces
• non-bespoke radius calibrations (i.e. some surfaces greater than 1000 mm)
• technical consultancy and training provided
• UKAS-accredited calibration service (laboratory No. 0478).

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