Fig. 1: Sparse aperture metalens imaging. | Nature Communications

Fig. 1: Sparse aperture metalens imaging.

From: A golay metalens for long-range, large aperture, thermal imaging via sparse aperture computational imaging

Fig. 1: Sparse aperture metalens imaging.The alternative text for this image may have been generated using AI.

a Schematic diagram of Golay metalens imaging in the mid-wave infrared (MWIR). b Comparison between the weight of a traditional silicon plano-convex lens and a metalens (both in a focal ratio (F/#) of 4 configuration) across different focal lengths. c Diffraction-limited resolution over distance for apertures with different resolution enhancement factors D/d, where D is the outer diameter of the sparse aperture system and d is the sub-aperture diameter (d = 80 mm in this case). d Schematic diagram of the Golay6 and Golay6+1 metalenses. The triangular lattice pattern with spacing L1, the central point (0, 0), the outer diameter D, and the sub-aperture diameter d are shown. The central sub-aperture is indicated by an arrow. e Simulated two-dimensional modulation transfer functions (2D MTFs, λ = 4.5 μm) for the Golay6 and the Golay6+1 metalenses. f Simulated one-dimensional modulation transfer function (1D MTF) comparison (λ = 4.5 μm) for the Golay6, the Golay6+1 metalenses, the center aperture and the effective aperture.

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