Fig. 1: Bifocal compound eyes of trilobite Dalmanitina socialis and its optical analogy. | Nature Communications

Fig. 1: Bifocal compound eyes of trilobite Dalmanitina socialis and its optical analogy.

From: Trilobite-inspired neural nanophotonic light-field camera with extreme depth-of-field

Fig. 1

a Conceptual sketch of extinct trilobite Dalmanitina socialis and its compound eyes. Each compound eye, composed of a lower lens unit and an upper lens unit with central bulge, can simultaneously focus the incident light to near and far point, similar to a coaxial bifocal lens. b The bioinspired photonic spin-multiplexed metalens array. The unit cell of metalens array is composed of rectangle amorphous TiO2 nanopillar sitting on a SiO2 substrate with \({P}_{x}={P}_{y}=450\) nm, and height \(h=600\) nm. c Optical microscope image of the fabricated metalens array. The right panel shows a zoomed-in image of 3 × 3 submetalens array. d The scanning electron microscopy (SEM) images show the top view and oblique view of the TiO2 nanopillars.

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