论文标题
基于扩散器的计算成像底尺
Diffuser-based computational imaging funduscope
论文作者
论文摘要
获得眼部护理是一项主要的全球挑战，可以通过低成本，便携式和易于使用的诊断技术来改善。基于扩散器的成像有可能实现廉价，紧凑的光学系统，该系统可以在一系列的散焦误差上重建对象的聚焦图像。在这里，我们提出了一个基于扩散器的计算基础，它重建了模型眼的重要临床特征。与现有的扩散器 - ibager架构相比，我们的系统通过将眼镜透镜转移到扩散器上，具有无限偶联的设计。这提供了跨越视野（FOV）的转移不变性，并在扩展的深度范围内进行了不变的放大倍率。在实验上，我们使用恒定的点传播功能在33 $^{\ circ} $ fov上演示了底面图像的重建，并在$ \ pm $ 4D折射率上进行稳健性。结合基于扩散器的波前传感，这项技术可以通过单个扩散器传感器实现组合的眼异常和基础筛选。
Poor access to eye care is a major global challenge that could be ameliorated by low-cost, portable, and easy-to-use diagnostic technologies. Diffuser-based imaging has the potential to enable inexpensive, compact optical systems that can reconstruct a focused image of an object over a range of defocus errors. Here, we present a diffuser-based computational funduscope that reconstructs important clinical features of a model eye. Compared to existing diffuser-imager architectures, our system features an infinite-conjugate design by relaying the ocular lens onto the diffuser. This offers shift-invariance across a wide field-of-view (FOV) and an invariant magnification across an extended depth range. Experimentally, we demonstrate fundus image reconstruction over a 33$^{\circ}$ FOV and robustness to $\pm$4D refractive error using a constant point-spread-function. Combined with diffuser-based wavefront sensing, this technology could enable combined ocular aberrometry and funduscopic screening through a single diffuser sensor.
