Fig. 1. Schematic diagram of PT symmetric imaging system

Fig. 2. Comparison of convergence curves of PT symmetric imaging system based on RUN optimization algorithm and GA

Fig. 3. Comparison diagram of reflectance between two algorithms

Fig. 4. Comparison diagram of transmittance between two algorithms

Fig. 5. Magnetization distribution map optimized by RUN optimization algorithm

Fig. 6. Magnetic field distribution along the y direction at image point C

Fig. 7. Comparison diagram of reflectance between the two algorithms under the condition of 3-layer structure

Fig. 8. Comparison diagram of transmittance between the two algorithms under the condition of 3-layer structure