Abstract
We present a novel metalens array for single-shot, large-volume, and high-resolution 3D imaging. Each metalens unit behaves as a special axicon to produce a Bessel beam point spread function (PSF), but with a bounded angular field of view (FOV). The metalens array can resolve three-dimensional information as a light-field camera. The bounded angular FOV prevents excessive image crosstalk between lens units to suppress background. Compared with conventional light-field cameras, our imaging device uses a single layer of metalens array without any bulk lens; the Bessel beam PSF increases the depth range that can be imaged while maintaining high resolution.
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