High resolution imaging system based on a ring sector rotating aperture

Abstract Sparse synthetic aperture surpasses the diffraction limit of a single aperture, providing a new approach to high-resolution imaging. Due to the complexity of multi-aperture systems, this paper proposes an unconventional and simple synthetic aperture system. The system consists of only two ring sector apertures, obtaining multiple frames of degraded images through rotating apertures, and then restoring high-resolution images through the iterative fusion algorithm of ptychography. The paper analyzes the system performance under different conditions by varying the annular width, central angle, and the number of rotations of the annular sector apertures, and compares it with conventional circular aperture systems. Simulation results demonstrate the significant imaging advantages of ring sector aperture systems at low fill factors.