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Optical system for the measurement of the surface topography of additively manufactured parts

Vilar, Narcís; Artigas, Roger; Bermudez, Carlos; Thompson, Adam; Newton, Lewis; Leach, Richard; Duocastella, Martí; Carles, Guillem

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Authors

Narcís Vilar

Roger Artigas

Carlos Bermudez

Lewis Newton

Martí Duocastella

Guillem Carles



Abstract

Additive manufacturing (AM) is now regularly used for customised fabrication of parts with complex shapes and geometries. However, the large range of relevant scales, high slopes, step-like transitions, undercuts, alternation between dark and overly bright regions and other complex features present on the surfaces, in particular of metal additive parts, represent a significant challenge for current optical measurement technologies. Measuring surfaces with such complex features requires high numerical aperture (NA) optics, and state-of-the-art systems commonly include optics that can only reliably acquire surface topographies over a small field of view (FOV), typically tens or hundreds of micrometers. Such measurements are often insufficient for practical applications. Here, we present an optical system that features a large NA (>0.3) and a wide FOV 2.9 times x 2.9 mm, capable of measuring AM parts in a single measurement, without the need for lateral stitching to increase the FOV. The proposed system exhibits optical properties that provide facility for large-field, high-resolution measurement of industrially-produced additively manufactured parts.

Citation

Vilar, N., Artigas, R., Bermudez, C., Thompson, A., Newton, L., Leach, R., …Carles, G. (2022). Optical system for the measurement of the surface topography of additively manufactured parts. Measurement Science and Technology, 33(10), Article 104001. https://doi.org/10.1088/1361-6501/ac7c5c

Journal Article Type Article
Acceptance Date Jun 27, 2022
Online Publication Date Jul 8, 2022
Publication Date 2022-10
Deposit Date Jul 19, 2022
Publicly Available Date Jul 9, 2023
Journal Measurement Science and Technology
Print ISSN 0957-0233
Electronic ISSN 1361-6501
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 33
Issue 10
Article Number 104001
DOI https://doi.org/10.1088/1361-6501/ac7c5c
Keywords Applied Mathematics; Instrumentation; Engineering (miscellaneous)
Public URL https://nottingham-repository.worktribe.com/output/8955346
Publisher URL https://iopscience.iop.org/article/10.1088/1361-6501/ac7c5c
Additional Information This is the Accepted Manuscript version of an article accepted for publication in Measurement Science and Technology. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://iopscience.iop.org/article/10.1088/1361-6501/ac7c5c

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