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 language | English (US) |
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Article number | e201700303 |
Journal | Journal of Biophotonics |
Volume | 11 |
Issue number | 3 |
DOIs | |
State | Published - Mar 2018 |
Keywords
- medical and biological imaging
- ophthalmic optics and devices
- optical coherence tomography
ASJC Scopus subject areas
- General Chemistry
- General Materials Science
- General Biochemistry, Genetics and Molecular Biology
- General Engineering
- General Physics and Astronomy