大气环境中傅里叶望远镜系统能量设计  

Energy Design of Fourier Telescope System in the Atmospheric Environment

作　　者：罗秀娟[1] 张羽[1] 孙鑫[1] 曹蓓[1] 曾志红[1] 夏爱利[1] 李立波[1] 朱少岚[1] 

机构地区：[1]中国科学院西安光学精密机械研究所,陕西西安710119

出　　处：《光学学报》2013年第8期21-28,共8页Acta Optica Sinica

摘　　要：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 techniques of Fourier telescope. Laser propagation in the atmosphere and its impact on the energy of the laser beams are analyzed. According to the uplink and downlink transmission of energy, a total laser energy calculation method of Fourier telescope system is derived, and the corresponding applicable conditions are given. Meanwhile, based on radiation theory, a fast energy estimation method is proposed by which the required total transmitter energy of a Fourier telescope for 1000 km low-orbit objects is estimated. The effects of transmitter energy imbalance on the image quality are pointed out and simulated. It can be concluded that the intensity differences among laser beams of transmitter array must be less than 5%. From the atmospheric transmittance, laser emitting aperture, beam collimation, transmitting scheme, speckle effect, receiving technologies, image reconstruction techniques and other aspects, the design ideas and measurements to reduce energy loss are put forward.

关 键 词：大气光学 傅里叶望远术 能量设计 主动成像 激光 大气 

分 类 号：TH743[机械工程—光学工程] TN249[机械工程—仪器科学与技术]