仰角变化对1.23m望远镜光机系统的影响

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。

Influence of Diversification of Elevation to the Opto-Mechanical System of 1.23 m Telescope

Considering both the opto-mechanical design and the image quality analysis of the 1.23 m aperture telescope,we build the opto-mechanical system which can fit the diversification of elevation from 0°~90°.The opto-mechanical system can meet the requirements of imaging of the telescope.However,there are some deformations in the tube of telescope with the diversification of elevation due to the gravity,and they result in distortion of the image.The main influencing factor of the diversification of elevation to the telescope is defocusing,and some material compensation methods are proposed to satisfy the requirements of observation.Meanwhile,some feasible opinions for the observational experiments and upgrading of telescopes with 1.23 m or more larger aperture are given.