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现有卫星激光通信终端通常采用同轴两反天线结构,该结构存在接收视场小、发射效率低等缺点。为消除同轴两反结构存在的固有缺陷,提高卫星激光通信系统的瞄准和捕获效率,研究了利用离轴三反结构提高卫星激光通信系统的性能。首先根据基本像差理论,推导得到离轴三反光学结构的初始结构方程。利用离轴结构具有更多设计参量的优势,对离轴三反结构进行优化设计,给出了设计实例。计算机仿真得到的光学传递函数、点列图、衍射包围圆能量和波前误差等均表明:离轴三反结构与同轴两反结构相比,具有更加优异的性能,能够满足卫星激光通信系统不断提升的性能要求。
The existing satellite laser communication terminal usually adopts a coaxial two anti-antenna structure, which has the disadvantages of small receiving field of view and low transmission efficiency. In order to eliminate the inherent defects of the coaxial two anti-structure and improve the aiming and acquisition efficiency of satellite laser communication system, the performance of satellite laser communication system using off-axis three-inverse structure is studied. First of all, according to the basic aberration theory, derive the initial structural equation of the off-axis triplet structure. Taking advantage of the more design parameters of the off-axis structure, the optimal design of the off-axis triple-inverse structure is given, and the design examples are given. Computer simulation of the optical transfer function, the point of the column diagram, the diffraction of the circle around the energy and the wavefront error and so on show that: the off-axis triple-inverse structure with the coaxial two anti-structure, has more excellent performance, able to meet the satellite laser communications system Increasing performance requirements.