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Recent Developments in Optical Gauge Block Metrology
An instrument for the measurement of ball diameters in the 0.5-20 mm range in a gauge block interferometer is realized. The measurement principle is that the ball is positioned between an optical flat and a calibrated gauge block. The total length (ball ÷ gauge block) is measured in a gauge block interferometer. Special precautions are taken which enable a parallel adjustment of the gauge block relative to the optical flat and a proper measurement of the deformations due to the measuring force.doi:10.1117/12.323097 fatcat:b3xfpw2ozrhodeqglac3fld65m