Vilar, NarcísArtigas, RogerBermudez, CarlosThompson, AdamNewton, LewisLeach, RichardDuocastella, MartíCarles, Guillem2023-01-172023-07-082022-07-080957-0233https://hdl.handle.net/2445/192263Additive 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.application/pdfeng(c) IOP Publishing, 2022ÒpticaMesuramentTopografiaOpticsMensurationTopographyinfo:eu-repo/semantics/article7254582023-01-17info:eu-repo/semantics/openAccess