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Related Experiment Video

Updated: Jul 23, 2025

Multimodal Imaging and Spectroscopy Fiber-bundle Microendoscopy Platform for Non-invasive, In Vivo Tissue Analysis

Multimodal Imaging and Spectroscopy Fiber-bundle Microendoscopy Platform for Non-invasive, In Vivo Tissue Analysis

Published on: October 17, 2016

Robust real-time imaging through flexible multimode fibers.

Abdullah Abdulaziz¹, Simon Peter Mekhail², Yoann Altmann³

¹School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK. a.abdulaziz@hw.ac.uk.

Scientific Reports

|July 14, 2023

Summary

This summary is machine-generated.

This study introduces a novel imaging system using a single flexible optical fiber that reconstructs clear images from distorted speckle patterns. The system is robust to bending and does not need distal end feedback, enabling new flexible imaging possibilities.

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Area of Science:

Optics and Photonics
Biomedical Imaging
Machine Learning

Background:

Conventional endoscopes use fiber bundles, limiting flexibility.
Single multimode optical fibers (MMFs) offer potential miniaturization but suffer from image distortion (speckle patterns) due to modal dispersion and coupling.
Fiber bending further complicates MMF imaging, hindering flexible applications.

Purpose of the Study:

To develop a real-time imaging system using flexible MMFs that is robust to bending.
To demonstrate image reconstruction from speckle patterns without distal end feedback.
To enable MMFs for flexible imaging applications previously hindered by bending-induced distortions.

Main Methods:

Utilized a single multimode optical fiber (MMF) for image transmission.
Employed a variational autoencoder (VAE) for reconstructing images from speckle patterns.
Trained the VAE to be robust to changes in fiber bend configurations.

Main Results:

Successfully reconstructed images from speckle patterns transmitted through a 300 mm MMF.
Demonstrated image recovery even when the fiber bend configuration was outside the training set.
The system showed robustness to a 50° change in fiber bend and an 8 cm range of movement.

Conclusions:

The proposed system enables real-time imaging through flexible MMFs, overcoming limitations of bending-induced speckle distortions.
The VAE-based approach allows for robust image reconstruction without needing distal end information.
This technology has potential for advanced flexible endoscopic imaging and other applications requiring miniaturized optical systems.