Real time full-color imaging in a Meta-optical fiber endoscope
Real time full-color imaging in a Meta-optical fiber endoscope
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DOI：
10.1186/s43593-023-00044-4
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发表时间：
2023-06-07
期刊：
影响因子：
--
通讯作者：
Majumdar, Arka
中科院分区：
文献类型：
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作者：
Froch, Johannes E.;Huang, Luocheng;Majumdar, Arka
内窥镜是微创手术发展的重要组成部分。它们的尺寸是最关键的方面之一，因为更小和刚性更低的内窥镜可以实现更高的灵活性，促进更大的可及性，并对周围组织产生更小的应力。在所有现有的内窥镜中，光学器件的尺寸对成像系统的小型化造成了主要限制。不仅制作小型光学器件很困难，而且它们的性能也会随着缩小而下降。元光学最近已经成为一个有前途的候选人，大大简化光学，同时实现类似的功能，显着减少的大小。在这里，我们报告了一个反向设计的元光学，它与相干光纤束相结合，使33%的刚性尖端长度比传统的梯度折射率（GRIN）透镜减少。我们使用超光学光纤内窥镜（MOFIE）来演示全可见光彩色的实时视频捕获，其空间分辨率主要受光纤本身的限制。我们的工作显示了超光学的集成和小型化的生物医学设备的微创手术的潜力。
Endoscopes are an important component for the development of minimally invasive surgeries. Their size is one of the most critical aspects, because smaller and less rigid endoscopes enable higher agility, facilitate larger accessibility, and induce less stress on the surrounding tissue. In all existing endoscopes, the size of the optics poses a major limitation in miniaturization of the imaging system. Not only is making small optics difficult, but their performance also degrades with downscaling. Meta-optics have recently emerged as a promising candidate to drastically miniaturize optics while achieving similar functionalities with significantly reduced size. Herein, we report an inverse-designed meta-optic, which combined with a coherent fiber bundle enables a 33% reduction in the rigid tip length over traditional gradient-index (GRIN) lenses. We use the meta-optic fiber endoscope (MOFIE) to demonstrate real-time video capture in full visible color, the spatial resolution of which is primarily limited by the fiber itself. Our work shows the potential of meta-optics for integration and miniaturization of biomedical devices towards minimally invasive surgery.