Sub-Rayleigh ghost imaging via sparsity constraints based on a digital micro-mirror device

In a diffraction-limited system, the imaging resolution limit is given by Rayleigh criterion. When both the imageʼs sparsity and the point spread function determined by the optical systemʼs Rayleigh diffraction limit are taken as popular a priori, sub-Rayleigh ghost imaging, which is backed up by numerical simulation and experiments, is achieved by modulating the thermal light with a digital micro-mirror device (DMD). The differences between this approach and former ghost imaging without considering the optical systemʼs point spread function are also discussed.