Phase contrast ghost imaging using pseudo-thermal light

Ghost imaging and ghost holography enable non-local imaging of amplitude and phase objects. Recent studies have indicated that dual-arm phase-contrast imaging can be achieved by extracting only the edges of the target, thereby obviating the need for a full image reconstruction. However, existing approaches still depend on either cameras or complex scanning procedures. In this paper, we combine spiral phase contrast imaging with ghost imaging and propose a computational dual-arm phase contrast imaging scheme based on Fourier basis modulation under speckle illumination, with single-point detection used in both arms. Experimental and simulation results validate the feasibility of the proposed scheme and demonstrate its effective implementation under compressed sampling. Furthermore, we also experimentally investigate the impact of the lateral coherence length of the speckle on edge extraction accuracy, as well as the effect of the number of speckles on the imaging signal-to-noise ratio.