Fig. 1. Diagram of experimental system

Fig. 2. Illustration of multi-focus forming process

Fig. 3. Multi-focus 3D model in ZEMAX non-sequential model

Fig. 4. Multi-focus simulation chart in ZEMAX software. (a) F3; (b) F2; (c) F1

Fig. 5. Comparison of calculation and simulation results of focus positions

Fig. 6. Simulated diagrams of focus energy distributions. (a) F1; (b) F2; (c) F3

Fig. 7. Experimental setup

Fig. 8. Range of experimental appropriate parameters

Fig. 9. Separation effect diagrams with traditional machanical cutting method. (a) Edge kerf magnified by 200 times; (b) PVB adhesive layer magnified by 200 times

Fig. 10. Separation effect diagrams with multi-focus laser cutting method. (a) Picture of real product; (b) edge kerf magnified by 200 times; (c) PVB adhesive layer magnified by 200 times

Fig. 11. SEM diagrams of laminated glass kerfs. (a) Top edge; (b) intermediate of glass; (c) PVB adhesive layer; (d) bottom edge

Fig. 12. Surface roughnesses of laminated glass kerfs. (a) Picture of real product; (b) dotted line A; (c) dotted line B; (d) dotted line C

Fig. 13. Separation effect diagrams of other materials by using multi-focus laser cutting. (a) Single-layer thick glass; (b) ultra clear glass; (c) KDP