能量设计技术是傅里叶望远镜的关键技术之一。分析了激光的大气传输效应及其对激光束能量的影响。根据上行和下行链路的能量传输,推导出一种傅里叶望远镜系统激光总能量计算方法,给出了相应的适用条件。同时,还提出一种基于辐射理论的快速能量估算方法,并用其估算了傅里叶望远镜探测1000km低轨道目标所需发射器总能量。指出了发射器能量不均衡对成像质量的影响并进行了仿真,得到发射器阵列各光束强度差别须小于5%的结论。从大气透射率、激光出射孔径、光束准直、发射方案、散斑效应、接收技术和图像重构技术等方面,提出了减少能量损失应采取的设计理念和措施。 Energy design technology is one of the key technologies of Fourier telescope. The atmospheric transmission effect of laser and its influence on laser beam energy are analyzed. According to the energy transmission in uplink and downlink, a method for calculating the total laser energy of Fourier telescope system is deduced, and corresponding applicable conditions are given. At the same time, a fast energy estimation method based on the radiation theory is also proposed, which is used to estimate the total energy of the launcher required by the Fourier telescope to detect a target of 1000 km in low orbit. The effect of transmitter energy imbalance on imaging quality is pointed out and the simulation results show that the difference of the beam intensities in the emitter array must be less than 5%. From the aspects of atmospheric transmittance, laser exit aperture, beam collimation, emission scheme, speckle effect, receiving technology and image reconstruction technology, the design concepts and measures should be taken to reduce energy loss.