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射电望远镜的表面精度除了受到面板加工及装配精度影响以外,在实际使用中还要受到重力变形,温度变形以及风载的影响.对于高频观测,微小的表面变形将对望远镜的观测性能带来较大影响.相位恢复全息方法是一种利用远场幅值进行表面检测的方法.因其不需额外的设备,同时具有测量方便及运行速度快的优点,在天线反射面测量领域获得了广泛的研究和应用.本文将对其中运用最广泛的Misell算法和OOF(Out of Focus)算法进行探讨,并通过仿真标准卡塞格伦天线对两种算法进行对比分析.
In addition to being affected by panel processing and assembly accuracy, the surface precision of radio telescopes is affected by gravity deformation, temperature deformation and wind load in practical use. For high-frequency observation, the small surface deformation brings about the observation performance of the telescope Greatly affected.Phase recovery holography method is a method of surface detection using far-field amplitude.Because it does not require additional equipment, with the advantages of convenient measurement and fast running speed, in the field of antenna reflection surface measurement has been widely Research and application of this paper.In this paper, the most widely used Misell algorithm and OOF (Out of Focus) algorithm will be discussed in this paper, and the two algorithms are compared and analyzed by the simulation standard Cassegrain antenna.