Figure 3: Experimental demonstration of super-resolution CDI of an effectively one-dimensional object.
From: Sparsity-based super-resolved coherent diffraction imaging of one-dimensional objects
(a) Experimental Set-up. The imaged object consists of five stripes, each of 2-μm width, as shown by the scanning electron microscope (SEM) image zoomed-in expanded from the mask. (b) The real-space 1D object and (c) its spatial power spectrum, that conform to the mask SEM image (shown in a) playing the role of the ‘original’ object. (d) Measured intensity pattern which approximately corresponds to a truncated power spectrum of c. (e) The blurred object calculated by inverse Fourier transform of the product: square root of the measured intensity times the correct phase. (f) Sparsity-based reconstruction (dashed red) compared with the original object (solid blue). (g) Recovered power spectrum and (h) spectral phase calculated through sparsity-based reconstruction (dash red) compared with these functions calculated by a Fourier transform of the original object.
