针对卫星光通信系统中接收系统对探测器位置的精度要求,提出利用扩大焦深范围的方法降低探测器的轴向位置精度要求。并根据接收光学天线存在中心遮挡的实际情况,采用切趾圆环对数型衍射光锥实现光束强度的轴向均匀分布。利用能量守恒法获得了衍射锥镜的位相分布函数和振幅透过率函数。计算机仿真结果表明,利用该光锥实现光强轴向均匀分布的能力远大于普通透镜,它将有效提升卫星光通信系统捕获、跟踪、通信性能的可靠性。 Aiming at the requirements of the receiver system in the satellite optical communication system for the position of the detector, the requirement of reducing the axial position accuracy of the detector by using the method of expanding the focal depth range is proposed. According to the actual occlusion of the receiving optical antenna, the axial distribution of beam intensity is achieved by the logarithmic diffraction cone of apodization ring. The phase distribution function and amplitude transmittance function of the diffracting cone mirror were obtained by energy conservation method. Computer simulation results show that using this cone of light to achieve a uniform axial distribution of light intensity is far greater than the ordinary lens, which will effectively enhance the satellite optical communication system capture, tracking, communication reliability.