基于非相干光传输矩阵的单光纤束偏振超光谱成像
Polarized hyperspectral imaging with single fiber bundle via incoherent light transmission matrix approach
摘要：
多光谱非相干光的散射是自然场景中常见且不利的信号置乱。然而，由于散射而模糊的光斑仍然保留了许多有待探索的信息。以前的方法无法从散射的非相干光中恢复偏振的高光谱信息，或者依赖于附加的色散元件。在这里，我们通过实验校准或数字仿真的方式推测未知的传输矩阵（TM），提出了非相干照明下扩展物体的传输矩阵（TM）方法。采用光纤束作为强大的成像和色散元件，我们恢复的空间信息在252偏振光谱通道从一个单一的散斑，从而实现单次拍摄，高分辨率，宽带高光谱成像的两个偏振态的廉价，紧凑，光纤束只有系统。基于散射原理本身，我们的方法不仅大大提高了TM方法检索输入光谱信息的鲁棒性，而且还揭示了仅借助简单的光学设置从模糊散斑中探索偏振空间光谱信息的可行性。
英文摘要：
The scattering of multispectral incoherent light is a common and unfavorable signal scrambling in natural scenes. However, the blurred light spot due to scattering still holds lots of information remaining to be explored. Former methods failed to recover the polarized hyperspectral information from scattered incoherent light or relied on additional dispersion elements. Here we put forward the transmission matrix (TM) approach for extended objects under incoherent illumination by speculating the unknown TM through experimentally calibrated or digitally emulated ways. Employing a fiber bundle as a powerful imaging and dispersion element, we recover the spatial information in 252 polarized-spectral channels from a single speckle, thus achieving single-shot, high-resolution, broadband hyperspectral imaging for two polarization states with the cheap, compact, fiber-bundle-only system. Based on the scattering principle itself, our method not only greatly improves the robustness of the TM approach to retrieve the input spectral information, but also reveals the feasibility to explore the polarized spatio-spectral information from blurry speckles only with the help of simple optical setups.
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