Journal
CIRP ANNALS-MANUFACTURING TECHNOLOGY
Volume 69, Issue 1, Pages 493-496Publisher
ELSEVIER
DOI: 10.1016/j.cirp.2020.04.017
Keywords
Measuring instrument; Optical; Optical coherence tomography
Funding
- UK's Engineering and Physical Sciences Research Council (EPSRC) [EP/P006930/1]
- Royal Academy of Engineering Chairship [RCSRF1516_2_7]
- EPSRC [EP/P006930/1] Funding Source: UKRI
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Optical coherence tomography (OCT) is an imaging technique which can provide sub-surface evaluation of defects in optically compliant components such as those manufactured by polymeric selective laser sintering. In OCT systems, achieving lateral imaging resolutions of <10 mm means that full-depth imaging requires multiple scans due to the limited depth of focus (DOF). We present a study on the application of 'non-diffracting' Bessel beams to extend system DOF and enable deeper imaging with a single scan. Such capability expands the potential for OCT as a rapid tool for sub-surface assessment, either in-line or in-process, by greatly reducing acquisition times. (C) 2020 The Authors. Published by Elsevier Ltd on behalf of CIRP.
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