Image quality enhancement for ultra-thin lensless multi-core fiber phase endoscopes

Jiawei Sun; Nektarios Koukourakis; Juergen W. Czarske

doi:10.1117/12.2651444

16 March 2023 Image quality enhancement for ultra-thin lensless multi-core fiber phase endoscopes

Jiawei Sun, Nektarios Koukourakis, Juergen W. Czarske

Author Affiliations +

Proceedings Volume 12389, Quantitative Phase Imaging IX; 1238904 (2023) https://doi.org/10.1117/12.2651444
Event: SPIE BiOS, 2023, San Francisco, California, United States

Abstract

Quantitative phase imaging (QPI) is an emerging label-free biomedical imaging modality. However, achieving high-fidelity QPI through an optical multicore fiber remains challenging. We demonstrate a novel phase reconstruction algorithm tailored for QPI through a lensless multi-core fiber (MCF) with a diameter of less than half a millimeter. Furthermore, precise reconstruction of the complex light field enables digital refocusing, providing flexible working distance for the lensless endoscope. Moreover, a total variation model is implemented to reduce the noise in the reconstructed images, enhancing the endoscopic image quality. This powerful ultra-thin QPI probe could open new perspectives for endoscopic imaging.

Conference Presentation

Citation Download Citation

Jiawei Sun, Nektarios Koukourakis, and Juergen W. Czarske "Image quality enhancement for ultra-thin lensless multi-core fiber phase endoscopes", Proc. SPIE 12389, Quantitative Phase Imaging IX, 1238904 (16 March 2023); https://doi.org/10.1117/12.2651444

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