Development of a 170-mm hollow corner cube retroreflector for the future lunar laser ranging

He Yun^{1, 2, 3}, Liu Qi^{1, 3, †}, He Jing-Jing², Li Ming⁴, Duan Hui-Zong^{1, 3}, Yeh Hsien-Chi^{1, 3}, Luo Jun¹

The optical system for the adjustment of the third dihedral angle. Two autocollimators are marked as aa“a” and “b”. The M1 represents the base glass of the hollow CCR; M2 and M3 represent mirror 2 and mirror 3 in Fig. 1, respectively.