中国物理B ›› 2017, Vol. 26 ›› Issue (6): 60706-060706.doi: 10.1088/1674-1056/26/6/060706
Bin Li(李斌), Wen-Hao Yu(于文豪), Mo Chen(陈莫), Jin-Long Tang(唐金龙), Hao Xian(鲜浩)
Bin Li(李斌)1,2,3, Wen-Hao Yu(于文豪)1,2,3, Mo Chen(陈莫)1,2,3, Jin-Long Tang(唐金龙)1,3, Hao Xian(鲜浩)1,3
摘要: In this paper, an active optics and co-focus experimental system of segmented mirror is built. Firstly, a support structure of segmented mirror is designed and it is verified by simulation to meet the requirement for the experimental system of segmented mirror. In this system, the large de-focus and tilt/tip errors of the segmented mirror are adjusted by observing the density and contrast of interference fringes based on isoclinic interference theory until the defocus and tilt/tip errors are in the detective range of the Shack-Hartmann. Then, the Shack-Hartmann is used to measure them and they are adjusted by actuators. The actuators are controlled by active optics to realize the closed-loop adjustment and maintenance for fine co-focus of segmented mirror. And the interference fringes are utilized to verify the detective precision of Shack-Hartmann. After the co-focus fine-tuning of the segmented mirror, the tilt/tip residual surface error is better than 0.01λ RMS; the defocus residual surface error is better than 0.01λ RMS.
中图分类号: (Optical instruments and equipment)