Interferenceless Coded Aperture Correlation Holographic Super‐Resolution Imaging With Structured Light Illumination

Interferenceless coded aperture correlation holographic (ICOACH) is a newly proposed nonscanning, wide‐spectrum, 3D wide‐field imaging technique for incoherent illumination in recent years and has demonstrated the potential for sizable applications in a variety of imaging fields. In this paper, we propose a super‐resolution imaging of the ICOACH (SR‐ICOACH) system with structural illumination. In SR‐ICOACH, structured light with different phase shifts of a certain space frequency illuminates the object to realize the encoding of the high‐frequency information of the object, and an annular sparse phase mask further modulates the object light information and records a single exposure object hologram (OH). Point spread hologram (PSH) of a pinhole is recorded by the regular ICOACH method. Then, the reconstructed image with a high signal‐to‐noise ratio with structured light fringes is obtained by the correction cross‐correlation reconstruction method with PSH and OH. Finally, the super‐resolution reconstructed image of the object is obtained by the super‐resolution reconstruction method with structured light reconstruction. The simulation results demonstrate the possibility of structured light illumination to improve the resolution of ICOACH imaging. The proposed method further extends the imaging performance of the ICOACH system and provides a new imaging tool for the system to be oriented to high‐resolution microimaging and other fields.