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Fourier holographic endoscopy for imaging continuously moving objects

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Title
Fourier holographic endoscopy for imaging continuously moving objects
Author(s)
Munkyu Kang; Wonjun Choi; Wonshik Choi; Choi, Youngwoon
Publication Date
2023-03
Journal
OPTICS EXPRESS, v.31, no.7, pp.11705 - 11716
Publisher
Optica Publishing Group
Abstract
Coherent fiber bundles are widely used for endoscopy, but conventional approaches require distal optics to form an object image and acquire pixelated information owing to the geometry of the fiber cores. Recently, holographic recording of a reflection matrix enables a bare fiber bundle to perform pixelation-free microscopic imaging as well as allows a flexible mode operation, because the random core-to-core phase retardations due to any fiber bending and twisting could be removed in situ from the recorded matrix. Despite its flexibility, the method is not suitable for a moving object because the fiber probe should remain stationary during the matrix recording to avoid the alteration of the phase retardations. Here, we acquire a reflection matrix of a Fourier holographic endoscope equipped with a fiber bundle and explore the effect of fiber bending on the recorded matrix. By removing the motion effect, we develop a method that can resolve the perturbation of the reflection matrix caused by a continuously moving fiber bundle. Thus, we demonstrate high-resolution endoscopic imaging through a fiber bundle, even when the fiber probe changes its shape along with the moving objects. The proposed method can be used for minimally invasive monitoring of behaving animals.(c) 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
URI
https://pr.ibs.re.kr/handle/8788114/13943
DOI
10.1364/OE.482923
ISSN
1094-4087
Appears in Collections:
Center for Molecular Spectroscopy and Dynamics(분자 분광학 및 동력학 연구단) > 1. Journal Papers (저널논문)
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