一款可单次快照完成高光谱+宽谱成像的微型相机
MetaSpectra+: A Compact Broadband Metasurface Camera for Snapshot Hyperspectral+ Imaging
- 创新设计超表面-折射复合结构，分路独立调控色散、曝光与偏振
- 覆盖近全可见光谱（250 nm），重建精度和总行程最短
- 适合需要多模态成像的便携设备，如无人机、智能终端
我们提出MetaSpectra+，一种紧凑型多功能相机，支持两种工作模式：(1) 单次快照实现高动态范围（HDR）+ 超光谱成像，或 (2) 单次快照实现偏振+ 超光谱成像。该相机采用新型超表面-折射组合结构，将入射光束分至多个通道，并独立控制每个通道的色散、曝光和偏振特性。与以往受限于窄波段（10–100 nm）的多功能超表面成像系统不同，MetaSpectra+可在近乎整个可见光谱（250 nm）范围内工作。相比现有单次快照超光谱成像系统，其在基准数据集上实现了最短总光程长度和最高重建精度。所展示的原型机能够从单次快照中重建高质量超光谱数据立方体，同时获取一张HDR图像或两个正交偏振通道。
原文摘要 · Abstract (English)
We present MetaSpectra+, a compact multifunctional camera that supports two operating modes: (1) snapshot HDR + hyperspectral or (2) snapshot polarization + hyperspectral imaging. It utilizes a novel metasurface-refractive assembly that splits the incident beam into multiple channels and independently controls each channel's dispersion, exposure, and polarization. Unlike prior multifunctional metasurface imagers restricted to narrow (10-100 nm) bands, MetaSpectra+ operates over nearly the entire visible spectrum (250 nm). Relative to snapshot hyperspectral imagers, it achieves the shortest total track length and the highest reconstruction accuracy on benchmark datasets. The demonstrated prototype reconstructs high-quality hyperspectral datacubes and either an HDR image or two orthogonal polarization channels from a single snapshot.
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