Robust real-time imaging through flexible multimode fibers.
Robust real-time imaging through flexible multimode fibers.
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DOI：
10.1038/s41598-023-38480-4
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发表时间：
2023-07-14
影响因子：
4.6
通讯作者：
McLaughlin, Stephen
中科院分区：
文献类型：
--
作者：
Abdulaziz, Abdullah;Mekhail, Simon Peter;Altmann, Yoann;Padgett, Miles J.;McLaughlin, Stephen
传统的内窥镜包括一束光纤，图像中的每个像素对应一根光纤。原则上，这可以减少到单个多模光纤（MMF），人类头发的宽度，每个图像像素具有一个光纤空间模式。然而，由于光纤的空间模式之间的色散和耦合，通过MMF传输的图像呈现为不可识别的散斑图案。此外，散斑图案随着光纤弯曲而改变，使得在柔性成像应用中使用MMF变得更加复杂。在本文中，我们提出了一个实时成像系统，使用灵活的MMF，但它是强大的弯曲。我们的方法在成像期间不需要从光纤的远端访问或反馈信号。我们利用变分自动编码器从散斑中重建和分类图像，并表明当光纤的弯曲配置改变为不属于训练集的一部分时，这些图像仍然可以恢复。我们利用一个300 mm长的62.5 μm芯的MMF对放置在距离光纤约20 cm处的cm物体进行成像，该系统可以处理光纤弯曲50的变化和8 cm的运动范围。
Conventional endoscopes comprise a bundle of optical fibers, associating one fiber for each pixel in the image. In principle, this can be reduced to a single multimode optical fiber (MMF), the width of a human hair, with one fiber spatial-mode per image pixel. However, images transmitted through a MMF emerge as unrecognizable speckle patterns due to dispersion and coupling between the spatial modes of the fiber. Furthermore, speckle patterns change as the fiber undergoes bending, making the use of MMFs in flexible imaging applications even more complicated. In this paper, we propose a real-time imaging system using flexible MMFs, but which is robust to bending. Our approach does not require access or feedback signal from the distal end of the fiber during imaging. We leverage a variational autoencoder to reconstruct and classify images from the speckles and show that these images can still be recovered when the bend configuration of the fiber is changed to one that was not part of the training set. We utilize a MMF 300 mm long with a 62.5 μm core for imaging cm objects placed approximately at 20 cm from the fiber and the system can deal with a change in fiber bend of 50 and range of movement of 8 cm.
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影响因子：
16.6
作者：
Chaudhary U;Vlachos I;Zimmermann JB;Espinosa A;Tonin A;Jaramillo-Gonzalez A;Khalili-Ardali M;Topka H;Lehmberg J;Friehs GM;Woodtli A;Donoghue JP;Birbaumer N
通讯作者：
Birbaumer N
影响因子：
3.6
作者：
Amitonova, Lyubov, V;de Boer, Johannes F.
通讯作者：
de Boer, Johannes F.
影响因子：
16.6
作者：
Caramazza, Piergiorgio;Moran, Oisin;Faccio, Daniele
通讯作者：
Faccio, Daniele
影响因子：
3.8
作者：
Carpenter, Joel;Eggleton, Benjamin J.;Schroeder, Jochen
通讯作者：
Schroeder, Jochen
DOI：
10.1038/s41377-021-00514-9
发表时间：
2021-04-21
期刊：
Light, science & applications
影响因子：
--
作者：
Li S;Saunders C;Lum DJ;Murray-Bruce J;Goyal VK;Čižmár T;Phillips DB
通讯作者：
Phillips DB