Crosstalk in monocentric multiscale systems based on an internal stray light stop suppression method.

Monocentric multi-scale (MMS) systems offer the advantages of a high resolution and wide field of view (FOV). These systems can improve the image resolution with a broad FOV by utilizing the stitching of the detectors. In addition to traditional stray light in optical systems, such as ghost reflection, scattering, and diffraction, the crosstalk between relay lenses cannot be ignored as a type of special stray light. Because of the intersection rays between the multiscale relay lenses in MMS systems, the rays enter the adjacent relay lens, which generates rays that do not belong to the corresponding relay lens in the corresponding image plane. Consequently, this crosstalk stray light affects the imaging contrast of the systems. This study aimed to investigate the crosstalk stray light in MMS systems. A simulation model of the MMS system was established. In the object-imaging process, the characteristic rays of a multiscale relay lens are traced using geometrical optics. Factors affecting the crosstalk stray light were studied in detail. The relationships between different parameters and crosstalk stray light were analyzed. A stray light suppression method is proposed based on incorporating a stray light stop in a monocentric (MC) objective to cut the crosstalk stray rays. The simulation results show that the crosstalk stray light can be effectively eliminated with this method, and the image contrast of the MMS systems is greatly improved.

Design methodology for catadioptric zoom panoramic optical systems based on image plane bending matched correction.

Zoom panoramic optical systems incorporate a panoramic peripheral vision zoom imaging function, enabling swift wide-area coarse and localized precise detection. These systems find applicability in examining pipes and other internal structures. This study centers on the catadioptric zoom panoramic optical system and its associated optical design method. A mathematical model of the front mirror was formulated based on the imaging relationship. Subsequently, the bending of the image plane of the front mirror was computed and simplified through curve fitting. The object surface bending of the zoom subsystem was established correspondingly, leveraging the solution for the mirror bending curve matched correction, culminating in deriving the initial structure of the zoom. Integrating the front mirror and zoom subsystems facilitated the comprehensive design realization of the catadioptric zoom panoramic optical system. A catadioptric zoom panoramic optical system was designed to validate the proposed design method. This study introduces a novel, to the best of our knowledge, conceptual approach to crafting catadioptric zoom panoramic optical systems.