针对共焦扫描显微成象中物体相对于被扫描点的位置矢量是反向移动的特性 ,探讨了物体移动后的物函数 在此基础上 ,根据成象的理论进行了计算 ,得到新的系统点扩散函数表达式 ,最后根据计算结果分析成象的性质 ,得出了系统成象的相干性 In view of the characteristic that the position vector of object relative to the scanned point in the confocal scanning microscopy is reverse moving, the object function after the object moving is discussed. Based on this, the calculation of the object function based on the imaging theory is given, and a new System point spread function expression, and finally analyze the nature of the image according to the calculation results, the coherence of the system imaging