DISCUSSION ON THE APPLICATION OF THE APERTURE IN FOURIER PTYCHOGRAPHY

The aperture stop is an important concept in applied optics and physical optics, determining the performance of optical systems such as resolution and imaging brightness. This paper discusses the application of the aperture stop in both microscopic and long-distance systems within the forefront of current computational imaging, specifically in Fourier ptychographic high-resolution imaging systems. Firstly, based on the thin lens imaging model, the coherent transfer functions corresponding to the pupil function in the object and image space are provided. Secondly, the actual settings of the aperture stop in two types of Fourier ptychographic imaging systems are analyzed. Finally, the equivalence of high-resolution image reconstruction from both object and image space data is verified through numerical simulation and optical experiments. The above discussions deepen the understanding of the concept of the aperture stop and its application in practical imaging systems.