Polarization-multiplexed, dual-beam swept source optical coherence tomography angiography

Jianlong Yang, Rahul Chandwani, Rui Zhao, Zhuo Wang, Yali Jia, David Huang, Gangjun Liu

Research output: Contribution to journalLetter

Abstract

A polarization-multiplexed, dual-beam setup is proposed to expand the field of view (FOV) for a swept source optical coherence tomography angiography (OCTA) system. This method used a Wollaston prism to split sample path light into 2 orthogonal-polarized beams. This allowed 2 beams to shine on the cornea at an angle separation of ~14°, which led to a separation of ~4.2 mm on the retina. A 3-mm glass plate was inserted into one of the beam paths to set a constant path length difference between the 2 polarized beams so the interferogram from the 2 beams are coded at different frequency bands. The resulting OCTA images from the 2 beams were coded with a depth separation of ~2 mm. A total of 5 × 5 mm2 angiograms from the 2 beams were obtained simultaneously in 4 seconds. The 2 angiograms then were montaged to get a wider FOV of ~5 × 9.2 mm2.

Original languageEnglish (US)
Article numbere201700303
JournalJournal of Biophotonics
Volume11
Issue number3
DOIs
StatePublished - Mar 2018

Keywords

  • medical and biological imaging
  • ophthalmic optics and devices
  • optical coherence tomography

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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