Fig. 1. Sketch of splicing grating

Fig. 2. Coma wave surface splicing. (a) Aligned splicing mode; (b) parallel splicing mode

Fig. 3. Astigmatic wave surface splicing. (a) Aligned splicing mode; (b) parallel splicing mode

Fig. 4. Distributions of far-field diffraction light intensity for splicing wavefront. (a) Aligned splicing mode with coma; (b) parallel splicing mode with coma; (c) aligned splicing mode with astigmatism; (d) parallel splicing mode with astigmatism

Fig. 5. Light path of splicing grating

Fig. 6. Reference interference fringes C for parallel splicing mode. (a) Initial fringe named C₀; (b) simulated initial fringe named C_0m;_{(c) prefabricated fringe named C0B; (d) real time fringe named C1; (e) prefabricated fringe C0B aligned with real time fringe C1}

Fig. 7. Mask of parallel splicing grating

Fig. 8. Interference fringe of parallel splicing grating

Fig. 9. -1st order diffraction wavefront of parallel splicing grating

Fig. 10. Recorded wavefront of parallel splicing gratings. (a) Experimental result; (b) simulated result

Fig. 11. Interference fringes of aligned splicing grating

Fig. 12. -1st diffraction wavefront of aligned splicing grating

Fig. 13. Recorded wavefront of aligned splicing grating

Fig. 14. Distributions of far-field diffraction light intensity for splicing grating. (a) Parallel splicing in experiment; (b) parallel splicing in simulation; (c) aligned splicing in experiment; (d) aligned splicing in simulation