High precision dynamic multi-interface profilometry with optical coherence tomography

Lawman, S and Liang, H ORCID: https://orcid.org/0000-0001-9496-406X, 2011. High precision dynamic multi-interface profilometry with optical coherence tomography. Applied Optics, 50 (32), pp. 6039-6048. ISSN 1559-128X

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Abstract

Optical coherence tomography (OCT) has mostly been used for high speed volume imaging but its profilometry potentials have not been fully exploited. This paper demonstrates high precision (as good as ~50nm) multi-interface profilometry using a Fourier domain OCT system without special anti-vibration devices. The precision is up to two orders of magnitudes better than the depth resolution of the OCT. Detailed analysis of the precision achieved for different surfaces is presented. The multi-interface profiles are obtained as a by-product of the tomography data. OCT has advantage in speed and sensitivity at detecting rough and internal interfaces compared to conventional optical profilometry. An application of the technique to the dynamic monitoring of varnish drying on paint-like substrates is demonstrated, which provides a better understanding of the formation of surface roughness. The technique has potential benefits in the field of art conservation, coatings technology and soft matter physics.

Item Type:	Journal article
Publication Title:	Applied Optics
Creators:	Lawman, S. and Liang, H.
Publisher:	The Optical Society of America
Place of Publication:	Washington, D.C.
Date:	2011
Volume:	50
Number:	32
ISSN:	1559-128X
Identifiers:	Number Type 10.1364/AO.50.006039 DOI
Rights:	This paper was published in Applied Optics (2011) 50:6039-6048 and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ao/abstract.cfm?uri=ao-50-32-6039. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Divisions:	Schools > School of Science and Technology
Record created by:	EPrints Services
Date Added:	09 Oct 2015 10:13
Last Modified:	09 Jun 2017 13:22
URI:	https://irep.ntu.ac.uk/id/eprint/9583

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