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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 22 — Oct. 25, 2010
  • pp: 22859–22866

Wettability characterization method based on optical coherence tomography imaging

Tapio Fabritius, Risto Myllylä, Shuichi Makita, and Yoshiaki Yasuno  »View Author Affiliations

Optics Express, Vol. 18, Issue 22, pp. 22859-22866 (2010)

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A novel method for surface wetting characterization based on contact angle measurements is presented. Three dimensional structural imaging of a droplet on a substrate is performed using optical coherence tomography (OCT) which provides micrometer resolution images without contact with the sample. An automatic OCT intensity variation based, layer segmentation method was implemented to identify air-droplet, droplet-substrate and air-substrate interfaces. A glycerol droplet on a rough tilted glass substrate was used as a test sample to demonstrate the applicability of the proposed method for wetting characterization. Results show that the contact angle of any observation angle can be obtained. In addition, the droplet’s average refractive index can be determined. The proposed method is an interesting and complementary tool for present wetting characterization methods.

© 2010 Optical Society of America

OCIS Codes
(070.5010) Fourier optics and signal processing : Pattern recognition
(100.0100) Image processing : Image processing
(110.0110) Imaging systems : Imaging systems
(110.4500) Imaging systems : Optical coherence tomography
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology

ToC Category:
Image Processing

Original Manuscript: September 2, 2010
Revised Manuscript: October 6, 2010
Manuscript Accepted: October 8, 2010
Published: October 13, 2010

Virtual Issues
Vol. 6, Iss. 1 Virtual Journal for Biomedical Optics

Tapio Fabritius, Risto Myllylä, Shuichi Makita, and Yoshiaki Yasuno, "Wettability characterization method based on optical coherence tomography imaging," Opt. Express 18, 22859-22866 (2010)

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