A new method of non-contact gauge block calibration using a fringe-counting technique: I. Theoretical basis |
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Authors: | M. Dobosz O. Iwasinska-Kowalska |
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Affiliation: | Mechatronics Department, Institute of Metrology and Measuring Systems, Warsaw University of Technology, A. Boboli 8 St. PL, 02-525 Warsaw, Poland |
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Abstract: | A new non-contact interference method for gauge block or length bar calibration is presented. A central interference fringe of polychromatic light is used for the determination of the end surface position of the measured artefact. Distances referring to these positions are measured using a fringe-counting technique, with a wavelength-stabilized laser interferometer. Absolute and comparative measurement methods are proposed. A new technique for central interference fringe detection and identification is discussed. |
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Keywords: | Absolute length measurement Zero interference order fringe Gauge block |
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