Fig. 1. Pupil alignment benchmark of large aperture segmented Mirror. (a) Experimental platform; (b) sampling area distribution; (c)~(e) changes in pupil intensity and boundary offset caused by tilting

Fig. 2. Co-focus detection results based on micro-lens array. (a) System schematic diagram; (b) experimental site; (c) intensity distribution of original focal plane; (d)~(f) intensity distribution of focal plane at different co-focus states; (g)~(i) intensity difference

Fig. 3. Verification of curvature radius measurement standard. (a) Ring detection principle diagram; (b) experimental platform; (c) light intensity difference; (d) aberration estimation

Fig. 4. Co-phase testing verification. (a) Experimental principle; (b)~(d) broadband interference fringes; (e)~(f) narrow band interference fringes

Fig. 5. Verification experiment of large-scale spacing testing for fiber interconnections. (a) Experimental principle; (b)~(e) fiber modes at different incident wavelengths

Fig. 6. Photon lantern spectrum testing verification. (a)~(c) At 1530 nm, the distribution of few-mode end mode field and cross sections; (d)~(f) at 1550 nm, the distribution of few-mode end mode field and cross sections; (g)~(i) at 1570 nm, the distribution of few-mode end mode field and cross sections

Fig. 7. Simulation analysis test verification results. (a) Intra-focal light intensity distribution; (b) extra-focal light intensity distribution; (c) light intensity difference; (c) reconstruction wavefront; (d) original wavefront

Fig. 8. Verification results of field experiments. (a) Intra-focal light intensity distribution; (b) extra-focal light intensity distribution; (c) wavefront solution results; (d) analysis of defocused star point maps