Compact wide-field-of-view imager with a designed disordered medium
Compact wide-field-of-view imager with a designed disordered medium
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DOI：
10.1007/s10043-015-0060-2
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发表时间：
2015-02
期刊：
影响因子：
1.2
通讯作者：
Tomoya Nakamura;R. Horisaki;J. Tanida
中科院分区：
文献类型：
--
作者：
Tomoya Nakamura;R. Horisaki;J. Tanida
无序介质已被用于实现紧凑的无透镜成像仪和分光镜。然而，随机散射导致传感器可获得的光能的显著损失。在这里，我们提出了一个紧凑的，宽视场（宽fov）成像仪，其中使用设计的无序介质增加了可用光能。玻璃中散射气孔的密度是空间分布的，从而实现有效的梯度折射率，将光从宽视场引导到传感器。基于数值实验，我们证明了比使用传统随机介质的成像仪更亮的宽视场成像。
Disordered media have been exploited for realizing compact lensless imagers and spectroscopes. However, random scattering causes significant loss of the light energy acquirable by a sensor. Here, we present a compact, wide-field-of-view (wide-FOV) imager in which the usable light energy is increased using a designed disordered medium. The density of scattering air holes in a glass is spatially distributed so as to achieve an effective graded index, which guides light from a wide-FOV toward a sensor. Based on numerical experiments, we demonstrated brighter wide-FOV imaging than an imager using a conventional random medium.