Spatial coherence effect on layer thickness determination in narrowband full-field optical coherence tomography

Avner Safrani, Ibrahim Abdulhalim

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Longitudinal spatial coherence (LSC) is determined by the spatial frequency content of an optical beam. The use of lenses with a high numerical aperture (NA) in full-field optical coherence tomography and a narrowband light source makes the LSC length much shorter than the temporal coherence length, hence suggesting that high-resolution 3D images of biological and multilayered samples can be obtained based on the low LSC. A simplified model is derived, supported by experimental results, which describes the expected interference output signal of multilayered samples when high-NA lenses are used together with a narrowband light source. An expression for the correction factor for the layer thickness determination is found valid for high-NA objectives. Additionally, the method was applied to a strongly scattering layer, demonstrating the potential of this method for high-resolution imaging of scattering media.

Original languageEnglish
Pages (from-to)3021-3027
Number of pages7
JournalApplied Optics
Volume50
Issue number18
DOIs
StatePublished - 20 Jun 2011

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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