机载多尺度广域高分辨率成像系统设计

针对机载光电成像系统的大视场高分辨率成像需求,设计一种基于共心球透镜的多尺度广域高分辨率光学成像系统,该光学系统包括大尺度共心球透镜和小尺度次级相机阵列,具有结构紧凑的优点。根据共心球透镜所具有的球差和色差特性,并结合小尺度相机对像差进行进一步校正以分割视场,可以实现大视场高分辨率成像。全系统在受力以及高、低温的条件下进行实验,实验结果表明该成像系统具有良好的稳定性,且全视场范围内的调制传递函数值恒接近于系统的衍射极限,弥散斑半径的方均根值小于探测器的像元尺寸,说明该系统的成像效果良好。所提系统可以有效解决传统机载成像系统难以同时满足大视场和高分辨率的问题,为光学成像系统设计提供一种新思路。

Design of Airborne Multi-Scale Wide-Field-of-View and High-Resolution Imaging System

Aiming at the wide-field-of-view and high-resolution imaging requirements of the airborne photoelectric imaging systems,we design a multi-scale wide-field-of-view and high-resolution optical imaging system based on a concentric spherical lens.The optical system includes a large-scale concentric spherical lens and a small-scale secondary camera array,and it has the advantage of compact structure.According to the spherical aberration and chromatic aberration of the concentric spherical lens,in combination with the small-scale cameras,the aberration is further corrected for the segmentation of the field of view,achieving wide-field-of-view and high-resolution imaging.Furthermore,the whole system is subjected to experiments under stress and at high and low temperatures.The experimental results show that the imaging system has good stability.Besides,the value of modulation transfer function in the full field of view is always close to the diffraction limit of the system,and the square root of the speckle radius is smaller than the pixel size of the detector,indicating good imaging effect of the system.In conclusion,the traditional airborne imaging system cannot satisfy both wide-field-of-view and high resolution at the same time,and provides a new idea for optical imaging system design.