Fig. 1. Schematic of wavefront detection of optical elements. (a) Reflected wavefront detection; (b) transmitted wavefront detection

Fig. 2. Schematic of 1D PSD calculation

Fig. 3. Flow chart of subaperture stitching

Fig. 4. Schematic of correlation match. (a) Template extraction from left aperture; (b) matrix to be matched extracted from right aperture

Fig. 5. Simulation results. (a) Reference surface; (b) stitching surface; (c) correlation coefficient

Fig. 6. Process of stitching operation. (a) Plan of subaperture; (b) sub1; (c) sub2; (d) correlation coefficient

Fig. 7. Comparison between stitching and full-aperture test results. (a) Stitching wavefront measurement; (b) full-aperture wavefront measurement; (c) stitching wavefront WPSD; (d) full-aperture wavefront WPSD

Fig. 8. Comparison of 1D PSD calculation. (a) 0°; (b) 30°; (c) 60°; (d) 90°; (e) 120°; (f) 150°