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The use of the optical standards in the industry is constantly growing. A high resolution 1D measurement instrument developed for calibrating precision line scales with sub-micrometre measurement uncertainty is presented in this paper. The mechanical foundation of this instrument is based around a custom designed, numerically controlled multi-axis granite stage manufactured by Newport Micro-Controle Spectra-Physics, but specifically designed to meet the metrological requirements of the Laboratory for Production Measurement (LTM) at the University of Maribor. The system integrates a numerically controlled multi-axis stage, a laser interferometer, and a vision system for detecting line position. The measurement and the analysis processes are completely automated in order to minimize manual labour during the calibration process, but also increase the calibration accuracy. Increasing calibration accuracy leads up to better quality of industrial measurements which is required by modern precision industry. The metrological capabilities of the presented measurement set-up were verified by some practical test measurements. Indirect users of the results of this research will be all manufacturers of precise products such as automotive and other industries.

Metrological set-up for Calibrating 1D Line Scales with Sub-Micrometre Precision