Fig. 2: Ptychographic imaging of the carbon nanotube (CNT) sample.

a Diffraction image from a defocused, 1.0 μm spot of 285.2 eV soft X-rays hitting several carbon nanotubes. The false-color scale is log₁₀ of the X-ray counts averaged over 30 images, each recorded with 500 ms exposure time. The corners of the image correspond to a momentum of 0.0160 nm⁻¹. b Amplitude image of the CNT sample from the reconstruction of a ptychographic dataset measured at 285.2 eV in a region similar to that where (a) was measured. The yellow annulus indicates the 1.0 μm diameter annular probe used for defocus ptychography imaging. The scale bar is amplitude in arbitrary units (see Supplementary Table 1 for acquisition details). c STXM image of the same area acquired with the 62 nm FZP, just before the ptychography measurement.