超宽视场离轴光学系统畸变一致性校正技术

为满足海岸带超宽视场和高分辨率的动态监测需求，高分辨率宽覆盖已成为空间光学遥感器的重要发展趋势。HY-1C/D卫星海岸带成像仪采用两台相机组合的方式实现大幅宽，单台相机是32°超宽视场离轴光学系统，相机存在弧形畸变且畸变较大。研究了超大视场离轴光学系统畸变一致性校正技术，提出“多变量仿真-高精密测量-交互迭代”的装调方法，开展了兼顾像质、视轴、畸变的多变量全链路仿真计算，通过高精度畸变测量系统实现了畸变补偿的交互迭代调整，解决了镜头装调阶段畸变不可控的难题，实现双台相机畸变一致性控制精度优于0.1%，完全满足测试技术要求，结果表明方法合理可行。

Distortion consistency correction technique for ultra-wide field of view off-axis optical system

In order to meet the requirements of ultra-wide field of view and high resolution dynamic monitoring in coastal zone, high resolution and wide coverage has become an important development trend of spatial optical remote sensors. The combination of two cameras was adopted by the HY-1C/D satellite coastal zone imager to realize the large width. The single camera is an 32° off-axis optical system with an ultra-wide field, and the camera has a large arc distortion. The distortion consistency correction technique for ultra-wide field of view off-axis optical system was mainly studied. The adjustment method of multivariate simulation-high precision measurements-interactive iteration was proposed, and the multivariable full-link simulation calculation with image quality, visual axis and distortion was carried out. Through the high precision distortion measurement system, the interactive iteration adjustment of the distortion compensation was realized, the problem of uncontrollable distortion in lens adjustment stage was solved, and the double camera distortion consistency control precision was better than 0.1%, which completely meet the test technical requirements. The results show that this method is reasonable and feasible.