光电成像系统存在一个最佳角放大率,使人眼与成像系统达到最佳匹配状态,系统获得最佳性能。基于MRC物理意义,提出MRC信道宽度CCD成像系统综合性能评价方法,通过实际CCD成像系统的观察实验确定了评价模型的表达式,分析了各种系统参数变化对该方法的影响。结果表明,利用MRC信道宽度评价方法描述的最佳角放大率变化与实际情况一致。在最佳角放大率情况下,系统与人眼视觉得到最佳匹配。 Photoelectric imaging system, there is an optimal angular magnification, the human eye and imaging system to achieve the best match, the system for optimal performance. Based on the physical meaning of MRC, a method to evaluate the performance of MRC channel width CCD imaging system is put forward. The expression of the evaluation model is confirmed by the actual experiment of CCD imaging system. The influence of various system parameters on the method is analyzed. The results show that the best angular magnification change described by the MRC channel width estimation method is consistent with the actual situation. In the best case of angular magnification, the system and the human eye to get the best match.