Low-coherence interferometry – an advanced technique for optical metrology in industry

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DOIResolve DOI: http://doi.org/10.1784/insi.47.4.216.63149
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TypeArticle
Journal titleInsight - Non-Destructive Testing and Condition Monitoring
ISSN1354-3296
1354-2575
Volume47
Issue4
Pages216219; # of pages: 3
AbstractLow-coherence interferometry (LCI) is an optical technique that may be used for industrial surface metrology with accuracy in the micron range. An instrument made with optical ibres is rugged enough to be used in industrial environments and the ibre-linked optical probe may be miniaturised for accessing tight locations. Among industrial applications developed at IMI, several cases for which LCI has been particularly useful, such as an elongational rheometer (RME), characterisation of wear damages on coating and laser-induced breakdown spectroscopy (LIBS), will be presented. The RME is an instrument in which a polymer sample is stretched in a controlled temperature furnace at up to 350°C. LCI has been used for monitoring the thickness of the samples. Wear damage is quantiied by the volume loss after a wear test. It requires a high depth resolution (axis perpendicular to the surface) but a relatively coarse transverse resolution. The LIBS is a technique that has been used for analysing the chemical composition of materials as a function of depth. LCI has been integrated to a LIBS instrument for measuring accurately the crater depth between each laser shot.
Publication date
PublisherBritish Institute of Non-Destructive Testing
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute
Peer reviewedYes
NRC number53760
NPARC number15936193
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Record identifier639dcb2c-e3d6-4d7a-84ae-81911216eb80
Record created2010-08-17
Record modified2016-05-09
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