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

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

Research output: Contribution to journalArticle

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 5×5mm2 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)
JournalJournal of Biophotonics
DOIs
StateAccepted/In press - Jan 1 2018

Fingerprint

Angiography
angiography
Optical tomography
Optical Coherence Tomography
tomography
Polarization
polarization
Prisms
Frequency bands
Cornea
field of view
Glass
Retina
Light
cornea
retina
prisms
interferometry
glass

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)

Cite this

Polarization-multiplexed, dual-beam swept source optical coherence tomography angiography. / Yang, Jianlong; Chandwani, Rahul; Zhao, Rui; Wang, Zhuo; Yali, Jia; Huang, David; Liu, Gangjun.

In: Journal of Biophotonics, 01.01.2018.

Research output: Contribution to journalArticle

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AU - Huang, David

AU - Liu, Gangjun

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