Fig. 4: Super-resolution and super-speed compressive endo-microscopy through the MM fibre with NA = 0.22.

a–c Images of two 450-nm-diameter fluorescent spheres through the MM fibre probe obtained by a, b the proposed super-resolution endo-microscopy (full FOV is presented in a and zoomed-in area of interest is presented in b) and c the state-of-the-art raster scan wavefront shaping-based endo-microscopy. d Cross-sectional plots along the dashed lines in (b open red circles) and (c filled blue circles). The blue line is a Gaussian fit to the data, and the red line interpolates the data. e Resolution of compressive endo-microscopy as a function of the total number of measurements for two fluorescent spheres is presented by different colours. The diffraction limit is represented by the solid green line, and the resolution achieved in the same setup by the state-of-the-art endo-microscopy method is represented by the solid blue line