通过对1.23m口径望远镜光学结构的像质分析,结合光机结构设计,搭建了适合仰角从0°～90°范围运动的光机系统,从方案设计上满足了望远镜系统的成像要求。但是在重力场中,随着望远镜俯仰角的变化,主次镜会产生相对的弯沉和倾斜,进而对系统成像质量产生影响。通过实际的成像实验,也验证了仰角变化对望远镜系统成像带来的离焦的影响,并给出了具体的系统补偿措施,满足了实际观测实验的要求。同时,为今后1.23m望远镜以及类似的大口径望远镜系统的实验和技术改造提出了切实可行的意见。 Through analyzing the image quality of the optical structure of 1.23m telescope and combining with the structure design of the light machine, an opto-mechanical system suitable for the movement of elevation angle from 0 ° to 90 ° was constructed. The imaging requirements of the telescope system were satisfied from the scheme design. However, in the gravitational field, as the pitch angle of the telescope changes, the primary and secondary mirrors will have relative deflection and tilt, which in turn affects the imaging quality of the system. Through the actual imaging experiments, the effect of the variation of elevation angle on the defocus caused by the imaging of the telescope system is also verified, and the specific system compensation measures are given to meet the requirements of the actual observation experiment. At the same time, practical suggestions are put forward for the experiment and technological transformation of the 1.23m telescope and similar large-aperture telescope systems in the future.