Paper 14111-3
Paper 14111-3
A miniature chromatic confocal sensing probe enabled by metasurfaces
13 April 2026 • 09:00 - 09:20 CEST | Madrid 2/Salon 4 (Niveau/Level 0)
Abstract
Photonic metasurfaces have tremendous potential to miniaturise optical measurement systems. In this work we demonstrate this by realising a novel fibre-linked chromatic confocal sensing (CCS) probe approaching the size of a grain of rice (5.5 mm long, 3 mm diameter), with a weight of less than 0.1 g while maintaining an axial measurement range of over 100 µm. The optical performance and measurement capability of the metalens CCS probe is demonstrated in preparation for planned use within a single-point diamond turning machine for surface topography measurement. We also discuss the use of two-photon polymerisation printed components as a method to facilitate minaturized probe assemblies.
Presenter
James Williamson
Univ. of Huddersfield (United Kingdom)
Dr James Williamson is a Senior Research Fellow within the Centre for Precision Technologies at the University of Huddersfield, UK. James completed his PhD titled “Dispersed Reference Interferometry for On-Machine Metrology” in 2017 and has since continued to work on miniaturisation and ruggedisation of surface metrology instrumentation for integration within manufacturing environments. James’ current research interests include nanophotonic metasurfaces and photonic integrated circuits to further improve accessibility and robustness of on-machine surface metrology.