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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 1 — Jan. 4, 2012

High precision dynamic multi-interface profilometry with optical coherence tomography

Samuel Lawman and Haida Liang  »View Author Affiliations

Applied Optics, Vol. 50, Issue 32, pp. 6039-6048 (2011)

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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 50 nm ) multi-interface profilometry using a Fourier domain OCT system without special antivibration devices. The precision is up to 2 orders of magnitude 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 the advantage in speed and sensitivity at detecting rough and internal interfaces versus conventional optical profilometry. An application of the technique to the dynamic monitoring of varnish drying on paintlike substrates is demonstrated, which provides a better understanding of the formation of surface roughness. The technique has potential benefits in the fields of art conservation, coatings technology, and soft matter physics.

© 2011 Optical Society of America

OCIS Codes
(110.4500) Imaging systems : Optical coherence tomography
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.6660) Instrumentation, measurement, and metrology : Surface measurements, roughness

ToC Category:
Imaging Systems

Original Manuscript: January 24, 2011
Revised Manuscript: April 7, 2011
Manuscript Accepted: June 2, 2011
Published: November 2, 2011

Virtual Issues
Vol. 7, Iss. 1 Virtual Journal for Biomedical Optics

Samuel Lawman and Haida Liang, "High precision dynamic multi-interface profilometry with optical coherence tomography," Appl. Opt. 50, 6039-6048 (2011)

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