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2022-07-08

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

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https://doi.org/10.1088/1361-6501/ac7c5c

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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 ($\gt$0.3) and a wide FOV $2.9\,\times\,2.9$ 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.

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Òptica, Mesurament, Topografia

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Optics, Mensuration, Topography

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VILAR, Narcís, ARTIGAS, Roger, BERMUDEZ, Carlos, THOMPSON, Adam, NEWTON, Lewis, LEACH, Richard, DUOCASTELLA, Martí, CARLES, Guillem. Optical system for the measurement of the surface topography of additively manufactured parts. _Measurement Science and Technology_. 2022. Vol. 33, núm. 10, pàgs. 104001. [consulta: 21 de gener de 2026]. ISSN: 0957-0233. [Disponible a: https://hdl.handle.net/2445/192263]

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