Fig. 1. Schematic diagram of Shack-Hartmann scanning and splicing plane mirror

Fig. 2. Schematic diagram of sub-aperture center location planning

Fig. 3. Fourier optical physics in the imaging of a single microlens

Fig. 4. Simulation results of single microlens imaging

Fig. 5. Simulation results of microlens array imaging

Fig. 6. Full caliber simulation results. (a) Added wave aberrations； (b) Stitching simulation results； (c) Result error

Fig. 7. Shack-Hartmann scanning and splicing detection system

Fig. 8. Plane mirror edge position. (a) Uupper edge；(b) Lower edge；(c) Left edge； (d) Right edge

Fig. 9. Fine alignment process. (a) Misalignment；(b) Alignment

Fig. 10. Full caliber slope test results. (a) Slope in the xdirection; (b) Slope in the y direction

Fig. 11. (a) Full aperture surface； (b) Interferometer test results

Fig. 12. Residual distribution