空间相机的MTF是描述成像系统的空间频率响应特性的重要指标之一。在介绍刃边法计算空间相机MTF原理的基础上,描述了刃边法的计算过程,结合天绘一号卫星在轨传感器MTF检测,对高分辨率相机的MTF进行了计算。结果表明,刃边法检测卫星相机MTF的方法可行,能够获得较好的评价结果。

Space camera MTF is one of the important indicators for describing the imaging system spatial frequency response characteristics. In introducing the principle of space camera MTF detected by an edge method, the calculation process is analyzed. Combining TH01 satellite in-orbit testing, the MTF of TH01 high resolution camera is calculated, which shows the results are stable, and the MTF values obtained in the horizontal direction and the vertical direction have a good consistency. The experiment shows that the edge method is feasible and able to obtain a good evaluation.