Fig. 3: Resolution testing of the BVMLs. | Nature Communications

Fig. 3: Resolution testing of the BVMLs.

From: Broadband and parallel multiple-order optical spatial differentiation enabled by Bessel vortex modulated metalens

Fig. 3

a Schematic of the experimental setup used to perform different order radial differential processing. b The standard 1951 USAF resolution test chart as the input object. c, d Imaging results of the test target 6-2 marked by the red box in (b) through the first- and second-order BVMLs. e, f Imaging results of the test target 5-4 marked by the blue box in (b) through the third- and fourth-order BVMLs. Each lower panel of (c–f): the normalized intensity distribution along the corresponding vertical dashed line.

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