Fig. 5: Imaging performance of AMDLs.
From: Large-scale achromatic flat lens by light frequency-domain coherence optimization
a Image results of 1951 USAF resolution test chart taken from samples S1 ~ S5. The whole images captured by CCD (left column). Scale bar, 250 μm; zoom-in images of group 5 element 1~3 (middle column); the light intensity (denoted as I) along the yellow dashed lines (right column). b The broadband MTF of samples S1-S5 and diffraction limited MTF (black dashed line). c Image of Nanjing University logo taken from sample S3 and a refractive lens. Zoom-in image shows the edge details of the logo. Scale bars, 2 mm. d Images of three colorful letters (N, J, U) taken from sample S3 and a refractive lens. Zoom-in image shows the edge details of the letter R. Scale bars, 4 mm
