Multimodal probe for optical coherence tomography epidetection and micron-scale indentation

L. Bartolini*, Fabio Feroldi, J. J.A. Weda, M. Slaman, J. F. De Boer, D. Iannuzzi

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

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Abstract

We present a multimodal ferrule-top sensor designed to perform the integrated epidetection of Optical Coherence Tomography (OCT) depth-profiles and micron-scale indentation by all-optical detection. By scanning a sample under the probe, we can obtain structural cross-section images and identify a region-of-interest in a nonhomogeneous sample. Then, with the same probe and setup, we can immediately target that area with a series of spherical-indentation measurements, in which the applied load is known with a μN precision, the indentation depth with sub-μm precision and a maximum contact radius of 100μm. Thanks to the visualization of the internal structure of the sample, we can gain a better insight into the observed mechanical behavior. The ability to impart a small, confined load, and perform OCT A-scans at the same time, could lead to an alternative, high transverse resolution, Optical Coherence Elastography (OCE) sensor.

Original languageEnglish
Article number1742007
JournalJournal of Innovative Optical Health Sciences
Volume10
Issue number6
DOIs
Publication statusPublished - 1 Nov 2017

Keywords

  • epidetection
  • indentation
  • microindentation
  • multimodal sensor
  • optical coherence tomography
  • Optomechanical

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