Extended sub-surface imaging in industrial OCT using ‘non-diffracting’ Bessel beams

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16 Citations (Scopus)


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 µm 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.

Original languageEnglish
Pages (from-to)493-496
Number of pages4
JournalCIRP Annals
Issue number1
Early online date17 May 2020
Publication statusPublished - 1 Jun 2020


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