Circularly polarized vision system for attenuation of reflection and glare

Authors

  • Luigi Montalto Dip. di Scienze e Ingegneria della Materia, dell’Ambiente ed Urbanistica, Università Politecnica delle Marche, Via Brecce Bianche 12- 60131 Ancona, Italy
  • Daniele Rinaldi Dip. di Scienze e Ingegneria della Materia, dell’Ambiente ed Urbanistica, Università Politecnica delle Marche, Via Brecce Bianche 12- 60131 Ancona, Italy
  • Paolo Castellini Dip. di Ingegneria Industriale e Scienze Matematiche, Università Politecnica delle Marche, Via Brecce Bianche 12- 60131 Ancona, Italy
  • Nicola Paone Dip. di Ingegneria Industriale e Scienze Matematiche, Università Politecnica delle Marche, Via Brecce Bianche 12- 60131 Ancona, Italy

DOI:

https://doi.org/10.21014/actaimeko.v15i3.2169

Keywords:

vision system, polarization, glare, reflection, vision for measurement, measurement

Abstract

The paper presents the use of applying circular polarization in a vision system. It describes how reflections and glare are reduced when illuminating a reflecting surface with circularly polarized light and collecting scattered light through the same circular polarizer. Even if usage of linear polarizers in vision systems is common, the use of circularly polarized light offers advantages due to the simplicity of the setup, which is composed of a single polarizing plate, without any need for accurate angular alignment, enhancing the contrast without significant loss of illumination due to the absence of dark field regions. Reduction of glare reduces image saturation, therefore allowing for a better contrast in images acquired from highly reflective surfaces.

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Published

2026-09-15

Issue

Vol. 15 No. 3 (2026)

Section

Research Papers

License

Copyright (c) 2026 Luigi Montalto, Daniele Rinaldi, Paolo Castellini, Nicola Paone

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