Single-lens computational imaging system design for coupled aberration of blur and distortion

Abstract

Blur and distortion are the primary degradation effects caused by optical aberrations in imaging systems. Traditionally, researchers often treat these two effects as independent issues, leading to separate investigations on deblurring and distortion correction algorithms. However, large field of view (FOV) infrared single-lens systems frequently exhibit coupled aberrations, where blur amplifies distortion and distortion exacerbates image information loss. In such cases, conventional methods often lead to significant optical model deviations and poor restoration performance. To address this issue, we propose an optical coupled imaging model based on point spread function (PSF) peak position mapping, which simulates these coupled effects and enhances the accuracy of large-FOV single-lens imaging simulation. Additionally, we propose a one-step restoration algorithm for coupled aberrations to simultaneously correct both blur and distortion. Our coupled imaging model is established using differentiable methods, enabling the formation of an end-to-end framework for optical, deblurring, and distortion correction parameters. Through a series of comparative experiments conducted with 40°-80° FOV and the fabrication of a prototype lens with a 19mm focal length, we demonstrate that our method significantly improves image quality in large-FOV single-lens systems and achieves high-resolution imaging in the 8–14μm infrared band.