Compact single-shot ranging and near-far imaging using metasurfaces
We present a metasurface imaging system capable of simultaneously capturing two images at close range (1-2~cm) and an additional image at long range (about 40~cm) on a shared photosensor. The close-range image pair focuses at 1.4~cm and 2.0~cm, respectively, which forms a focal stack, enabling passive ranging with an accuracy of $\pm$1~mm from 12~mm to 20~mm through a computationally efficient depth-from-defocus algorithm for a simplified scenario. The entire system is compact, with a total track length of 15~mm, making it suitable for seamless integration into edge platforms for defense and other resource-constrained applications.
| Authors | Junjie Luo, Yuxuan Liu, Wei Ting Chen et al. |
|---|---|
| Primary category | eess.IV |
| Published | 11 April 2026 |
| Last updated at source | 11 April 2026 |
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