Aiming at the problem of high tolerance sensitivity and difficult adjustment of 30 times continuous zoom TV, the effects of eccentricity on the MTF (modulation transfer function) of the optical system were analyzed by optical software. The results show that the central error of the front mirror group is sensitive to the asymmetric aberration. In this paper, the structural form of the spacer ring machine program is optimized, so that the lower surface of the lens is automatically centering. As the moving component of the system, both zoom lens group and compensation lens group are the key factors affecting the system image quality during the zooming process. In this paper, mechanical centering tooling is used to make the central axis of the moving assembly parallel to the axis of the guide rod. The optical axis of all components is corrected by the optical axis of the front mirror group. The optical system is precisely adjusted, and the optical resolution of the small field of view reaches 2.43″, which is close to the limit of diffraction resolution.

空间旋转多光轴系统光轴平行性影响系统指向精度且校准难度高、耗时.基于空间旋转多光轴系统光轴校准原理,获得了校准理论模型;结合实验研究,建立了高精度光轴校准方案;以机械回转轴为基准,粗调准和精调准结合,以调整传感器安装面为粗调,借助双光楔实现光学量级的精校准;先校正可见光光轴与机械回转轴的平行性,再保证激光光轴与机械回转轴的平行性,最终保证可见光光轴与激光光轴的平行性.试验结果表明,该校准方案精度高,指标优于0.1 mrad,可用于实际工程装调.