Single-shot multi-depth full-field optical coherence tomography using spatial frequency division multiplexing

Jungho Moon, Yong Sik Lim, Seokchan Yoon, Wonshik Choi

Research output: Contribution to journalArticlepeer-review

Abstract

Fast 3D volumetric imaging has been essential for biology, medicine and industrial inspections, and various optical coherence tomography (OCT) methods have been developed to meet such needs. Point-scanning based approaches, such as swept-source OCT and spectral domain OCT, can obtain a depth information at once, but they require lateral scan for full 3D imaging. On the contrary, full-field OCT needs the scanning of imaging depth while it records a full lateral information at once. Here, we present a full-field OCT system that can obtain multi-depth information at once by a single-shot recording. We combine a 2D diffraction grating and a custom-made echelon to prepare multiple reference beams having different pathlengths and propagating angles. By recording a single interference image between the reflected wave from a sample and these multiple reference beams, we reconstruct full-field images at multiple depths associated with the pathlengths of the individual reference beams. We demonstrated the single-shot recording of 7 different depth images at 10 µm for biological tissues. Our method can potentially be useful for applications where high-speed recording of multiple en-face images is crucial.

Original languageEnglish
Pages (from-to)7060-7069
Number of pages10
JournalOptics Express
Volume29
Issue number5
DOIs
Publication statusPublished - 2021 Mar 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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