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Defocus-Resistant Computational Imaging With Wavefront-Coding Metalens
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DOI：10.1109/JSTQE.2025.3634773.png)
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Abstract
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In conventional wavefront coding (WFC) imaging system, the phase mask is separated from the imaging lens, resulting in a bulky and inflexible optical setup. In this work, we introduce a cubic-metalens that integrates the cubic phase mask and the imaging lens into a single metasurface device. By combining this cubic-metalens with a board-CMOS camera, we have developed a compact, defocus-resistant computational imaging system. The incorporation of the cubic phase extends the depth of focus of the metalens, as evidenced by its defocus-insensitive point spread function (PSF) and modulation transfer function (MTF). We demonstrate that high-fidelity images can be computationally restored through Wiener filter for this compact image system based on cubic-metalens, even in the presence of transparent obstacles.
Keywords:
Wavefront coding imaging
cubic-metalens
defocus-resistant
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