Abstract We propose to use high numerical aperture single mode optical fibers like photonic crystal fiber for lensless in-line holographic microscopy. Highly divergent beam helps to overcome the spatial sampling limitation of the image sensor. In this paper, a submicron lateral resolution has been demonstrated, with an imaging sensor of pixel pitch 1.12 μm and a photonic crystal fiber of mode field diameter 1.8 μm. In earlier methods of single-shot lensless imaging, submicron resolution has been obtained at very small working distance and field of view. The proposed method improves the resolution without compromising the working distance. A working distance (but not limited to) ~ 1.7 mm with a field of view ~ 1.4 mm has been demonstrated.

中文翻译：

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用于高分辨率无透镜在线全息显微镜的光子晶体光纤

摘要 我们建议使用高数值孔径单模光纤，如光子晶体光纤，用于无透镜在线全息显微镜。高度发散的光束有助于克服图像传感器的空间采样限制。在本文中，已经证明了亚微米横向分辨率，像素间距为 1.12 μm 的成像传感器和模场直径为 1.8 μm 的光子晶体光纤。在早期的单次无镜头成像方法中，亚微米分辨率已在非常小的工作距离和视场内获得。所提出的方法在不影响工作距离的情况下提高了分辨率。工作距离（但不限于）~ 1.7 毫米，视野~ 1.4 毫米已被证明。