An accurate double-faced optical-interferometric strategy for estimation of gauge block Fo/Fu dimensional variations

Authors

  • Ricardo dos Santos França INMETRO

DOI:

https://doi.org/10.21014/actaimeko.v14i2.1978

Keywords:

interferometry, Fo/Fu, geometrical parameters, mechanical comparators

Abstract

A new and fast calculation method proposed for length variations or Fo/Fu, as form estimations for gauge block measurement surfaces, uses a double-face-wringing interferometric approach, through length scanning of their five center and corner points, as defined through their optical inspection in both opposite gauge measurement surfaces. This method achieves realistic dimensional/bidirectional length definitions for such dimensional standard parameters as obtained by optical measurements. Two sets of real gauge block double one-sided interferometric measurement results are taken as examples, combined and inserted within the proposed algorithm, in order to achieve more accurate center and corner deviation lengths for each of such reliable metrological standards.

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Published

2025-06-26

Issue

Vol. 14 No. 2 (2025)

Section

Research Papers

License

Copyright (c) 2025 Ricardo dos Santos França

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