Fig. 1. Schematic diagram of single LED light source mathematical model

Fig. 2. Schematic diagram of the position of the measured plane

Fig. 3. Hardware environment of chip package quality inspection

Fig. 4. Schematic diagram of light source coordinate system

Fig. 5. Schematic diagrams of related parameters labeled in different coordinate systems

Fig. 6. Schematic diagram of vector analysis

Fig. 7. Flow chart of the original Salp swarm algorithm

Fig. 8. Convergence comparison of different algorithms

Fig. 9. Experimental platform of the plane illumination measurement

Fig. 10. Comparison of theoretical and actual relative illumination distribution

Fig. 11. Comparison of theoretical illumination of the measured plane and the background

Fig. 12. Illumination distribution along the X-axis when changing by 1° 变化1°时X轴方向上的照度分布

Fig. 13. Illumination distribution along the X-axis when changing by 1° 变化1°时X轴方向上的照度分布

Fig. 14. Illumination distribution along the X-axis when changing by 10 mm 变化10 mm时X轴方向上的照度分布

Fig. 15. Illumination distribution along the X-axis when changing by 10 mm 变化10 mm时X轴方向上的照度分布

Fig. 16. Comparison of optimization results and traditional forward illumination