Three factors are the dimension of laser speckle resulted by atmospheric turbulence, space sampling frequency based on sampling theory and the loss of the frequency spectrum function of the array detector. 对第二问题讨论了对其有影响的三个方面:大气湍流引起激光碎斑尺寸,由采样定理决定的空间采样率,由阵列探测器的频谱函数引起的损失。