Ultra-compact snapshot spectral light-field imaging

作者：Hua, Xia; Wang, Yujie; Wang, Shuming^*; Zou, Xiujuan; Zhou, You; Li, Lin; Yan, Feng; Cao, Xun^*; Xiao, Shumin^*; Tsai, Din Ping^*; Han, Jiecai; Wang, Zhenlin^*; Zhu, Shining^*

来源：Nature Communications, 2022, 13(1): 2732.

DOI：10.1038/s41467-022-30439-9

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The authors demonstrate compact spectral light-field imaging by using a transversely dispersive metalens array and a monochrome imaging sensor. They show that 4D images can be obtained in a single shot, and demonstrate discrimination of visually indistinguishable objects. @@@ Ideal imaging, which is constantly pursued, requires the collection of all kinds of optical information of the objects in view, such as three-dimensional spatial information (3D) including the planar distribution and depth, and the colors, i.e., spectral information (1D). Although three-dimensional spatial imaging and spectral imaging have individually evolved rapidly, their straightforward combination is a cumbersome system, severely hindering the practical applications of four-dimensional (4D) imaging. Here, we demonstrate the ultra-compact spectral light-field imaging (SLIM) by using a transversely dispersive metalens array and a monochrome imaging sensor. With only one snapshot, the SLIM presents advanced imaging with a 4 nm spectral resolution and near-diffraction-limit spatial resolution. Consequently, visually indistinguishable objects and materials can be discriminated through SLIM, which promotes significant progress towards ideal plenoptic imaging.

• 单位
  南京大学