胶片摄影空间相机动态成像质量评价

对以胶片为图像载体的可见光高分辨率空间相机来说，除光学系统本身的像质和胶片分辨力对相机的最终成像质量产生影响外，相机的像移补偿机构、像移速度控制系统、最佳成像焦面位置的确定等都对相机的最终成像质量产生影响，通过对胶片式可见光高分辨力空间相机整机系统的成像理论进行分析探讨，采用光学传递函数的方法进行相机整机系统的像质评价及像面位置的准确标定。详细给出了空间相机的实验室检测和在轨摄影的动态摄影传递函数及数据分析结果，通过理论值与此方法分析出的传递函数值作对比，证明了胶片摄影刀口阴影经付立叶变换等方法处理所得MTF的方法可以用来评价空间相机的动态成像质量，对用实验室实测的相机动态MTF结果来预估相机在轨动态MTF及在轨摄影分辨力方面做出了有益的尝试。

Evaluation of dynamic imaging quality of space film camera

To the visible light and high resolution space film camera, besides the effect of the optical system’s imaging quality and the film resolution, camera’s imaging quality is affected by the device of image shift compensation, the control system of image shift speed and focusing accuracy. By analyzing the imaging theory of the visible light and high resolution space film camera, the imaging quality of complete appliance system is evaluated and the position of imaging plane is exactly calibrated by the MTF method. By contrasting the theoretical value and the experimental data, it is shown that the MTF method which is calculated by FFT etc. of knife edge shadow can be used to evaluate the dynamic imaging quality of the space camera.