Design of Wide-Band Wide-Area High-Resolution Optical System Based on Multi-Scale Imaging

In view of the all-weather, large-field and high-resolution imaging requirements of photoelectric imaging systems, we design a wide-area high-resolution optical imaging system with a wide band of 0.4-1.7 mu m based on the principle of multi-scale imaging. The system consists of a concentric sphere objective and 37 relay subsystem arrays. Multiple relay subsystem arrays perform field segmentation, imaging and aberration correction of the primary intermediate image surface obtained by the concentric sphere objective, so as to achieve wide-area high-resolution imaging. After optimizing the design, a wide-band large-field high-resolution optical system with a wide field of view of 105. 6 degrees x 25. 6 degrees is finally obtained. The maximum root mean square radius value of the point column plot within the single-channel full field of view of the system is less than one cell size, and the value of each field of view modulation transfer function is greater than 0. 6 at the spatial frequency of 33 lp/mm, and the curve is smooth and concentrated. The analysis results show that the system meets the requirements of high-resolution, all-weather imaging with a large field of view. It can provide a feasible reference for the design of subsequent wide-band large-field high-resolution optical imaging systems.