Perspectives of mid-infrared optical coherence tomography for inspection and micrometrology of industrial ceramics
2014 (English)In: Optics Express, ISSN 1094-4087, Vol. 22, no 13, 15804-15819 p.Article in journal (Refereed) Published
Optical coherence tomography (OCT) is a promising tool for detecting micro channels, metal prints, defects and delaminations embedded in alumina and zirconia ceramic layers at hundreds of micrometers beneath surfaces. The effect of surface roughness and scattering of probing radiation within sample on OCT inspection is analyzed from the experimental and simulated OCT images of the ceramic samples with varying surface roughnesses and operating wavelengths. By Monte Carlo simulations of the OCT images in the mid-IR the optimal operating wavelength is found to be 4 mu m for the alumina samples and 2 mu m for the zirconia samples for achieving sufficient probing depth of about 1 mm. The effects of rough surfaces and dispersion on the detection of the embedded boundaries are discussed. Two types of image artefacts are found in OCT images due to multiple reflections between neighboring boundaries and inhomogeneity of refractive index.
Place, publisher, year, edition, pages
2014. Vol. 22, no 13, 15804-15819 p.
Optical coherence tomography, Numerical approximation and analysis, Nondestructive testing, Optical inspection, Surface measurements, roughness, Imaging through turbid media, Infrared imaging, Scattering
Engineering and Technology
Research subject SRA - Production
IdentifiersURN: urn:nbn:se:kth:diva-144593DOI: 10.1364/OE.22.015804ISI: 000338055900065ScopusID: 2-s2.0-84903729685OAI: oai:DiVA.org:kth-144593DiVA: diva2:714259
ProjectsMultilayer (FP7-NMP4-2007-214122)National Institute of Health (P41EB015903)
FunderXPRES - Initiative for excellence in production researchEU, FP7, Seventh Framework Programme, FP7-NMP4-2007-214122
QC 20140807. Updated from submitted to published.2014-04-252014-04-252014-08-07Bibliographically approved