Stasio Nicolino, Moser Christophe, Psaltis Demetri
Opt Lett. 2016 Jul 1;41(13):3078-81. doi: 10.1364/OL.41.003078.
The images produced by multicore endoscopes are pixelated, and their resolution is limited by the core-to-core spacing. Lenses can be used to improve the resolution, but this reduces the field of view proportionally. Lensless endoscopy through multicore fibers can be achieved by using wavefront shaping techniques. This requires a calibration step, and the conformation of the fiber must remain constant over time. Here we demonstrate that, without a calibration step and in the presence of core-to-core coupling, we can obtain fluorescence images with a resolution better than the core-to-core spacing. This is accomplished by taking advantage of the memory effect present in these kinds of fibers.
多核内窥镜产生的图像是像素化的，其分辨率受芯与芯间距的限制。透镜可用于提高分辨率，但这会按比例减小视野。通过使用波前整形技术可以实现通过多核光纤的无透镜内窥镜检查。这需要一个校准步骤，并且光纤的形态必须随时间保持恒定。在这里，我们证明，在没有校准步骤且存在芯与芯耦合的情况下，我们可以获得分辨率优于芯与芯间距的荧光图像。这是通过利用这类光纤中存在的记忆效应来实现的。
