目前绝大多数高分辨率宽幅空间光学遥感器焦面均需要由多片探测器拼接而成，获得的遥感影像也有非拼接区和拼接区的差别。随着遥感影像的应用越来越广泛，对焦面拼接区像质的要求也越来越高。文章研究某型号光学拼接型遥感器拼接区鬼像的变化规律、形成原因，提出避免措施，提高拼接区图像品质。首先，针对整机测试中发现的鬼像进行研究，找出其变化规律；随后，分别利用几何光学和光学仿真软件计算的方法，分析得出产生鬼像的原因为成像光线在拼接镜刃边内壁的掠射；然后，利用搭建模拟光路的方法进行定性试验验证，得到了与整机测试和理论分析相吻合的结果；最后，对现有拼接镜设计提出了针对性的改进，给出了避让角的确定方法，并通过整机试验，验证了文章提出的避免拼接区鬼像的解决方案可靠合理。%Most high resolution cameras need several detectors. The images have butting area or non-butting area. Image quality of the butting area need increased, this paper researches the ghost images on the butting area in the optical butting remote sensor. Firstly, it studies the ghost images which appear in test and finds their change law. Secondly, it uses the geometrical optics method and optical simulation software separately and comes to a conclusion that the grazing-incidence on the lateral wall of the butting mirror is the cause of the ghost images. Then, the paper puts up the simulant optical path and gets the same result, and finally, optimizes the butting mirror. The whole study shows that the solution of the grazing-incidence on the lateral wall is reasonable and reliable.
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