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Removal of back-reflection noise at ultrathin imaging probes by the single-core illumination and wide-field detection

Title
Removal of back-reflection noise at ultrathin imaging probes by the single-core illumination and wide-field detection
Author
유홍기
Keywords
OPTICAL COHERENCE TOMOGRAPHY; CONFOCAL MICROSCOPY; FIBER; ENDOSCOPE; BUNDLE
Issue Date
2017-07
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v. 7, Article no. 6524
Abstract
Thin waveguides such as graded-index lenses and fiber bundles are often used as imaging probes for high-resolution endomicroscopes. However, strong back-reflection from the end surfaces of the probes makes it difficult for them to resolve weak contrast objects, especially in the reflectance-mode imaging. Here we propose a method to spatially isolate illumination pathways from detection channels, and demonstrate wide-field reflectance imaging free from back-reflection noise. In the image fiber bundle, we send illumination light through individual core fibers and detect signals from target objects through the other fibers. The transmission matrix of the fiber bundle is measured and used to reconstruct a pixelation-free image. We demonstrated that the proposed imaging method improved 3.2 times on the signal to noise ratio produced by the conventional illumination-detection scheme.
URI
https://www.nature.com/articles/s41598-017-07024-yhttps://repository.hanyang.ac.kr/handle/20.500.11754/114764
ISSN
2045-2322
DOI
10.1038/s41598-017-07024-y
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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