Co-focus experiment of segmented mirror

Li Bin^{1, 2, 3, †}, Yu Wen-Hao^{1, 2, 3}, Chen Mo^{1, 2, 3}, Tang Jin-Long^{1, 3}, Xian Hao^{1, 3, ‡}

(a) Interference fringes when the segmented mirror has a large tilt/tip error; (b) the interference fringes when the segmented mirror has a small tilt/tip error.