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

Autor:	Yang, Jianlong, Chandwani, Rahul, Zhao, Rui, Wang, Zhuo, Jia, Yali, Huang, David, Liu, Gangjun
Rok vydání:	2017
Předmět:	Physics - Medical Physics Physics - Instrumentation and Detectors
Druh dokumentu:	Working Paper
Popis:	A polarization-multiplexed, dual-beam setup is proposed to expand the field of view for a swept source optical coherence tomography angiography (OCTA) system. This method used a Wollaston prism to split sample path light into two orthogonal-polarized beams. This allowed two beams to shine on the cornea at an angle separation of ~ 14 degrees, 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 two polarized beams so the interferogram from the two beams are coded at different frequency bands. The resulting OCTA images from the two beams were coded with a depth separation of ~ 2 mm. 5x5 mm2 angiograms from the two beams were obtained simultaneously in 4 seconds. The two angiograms then were montaged to get a wider field of view (FOV) of ~ 5x9.2 mm2. Comment: submitted
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1710.09024 Zobrazit plný text záznamu View this record from Arxiv