Liao Yubo, Liu Jinyuan, Cai Houzhi, Bai Yanli, Fu Wenyong, Chen Jiayu, Guo Quanliang. Improvement of Field Curvature in Magnetic-Focusing Image Converter Tube[J]. Chinese Journal of Lasers, 2017, 44(10): 1004004
- Chinese Journal of Lasers
- Vol. 44, Issue 10, 1004004 (2017)
Fig. 1. Field curvature analysis of single magnetic lens system
Fig. 2. Field curvature analysis of double magnetic lens system
Fig. 3. (a) Imaging model of framing converter tube with double magnetic lens system; (b) distribution of magnetic field of two systems on the axis
Fig. 4. Variation of spatial resolution with off-axis distance for two systems
Fig. 5. Curved image surfaces obtained by computer simulation for (a) single magnetic lens and (b) double magnetic lens systems
Fig. 6. Schematic of experimental system
Fig. 7. Testing results under different excitation currents for single magnetic lens system. (a) I=0.344 A; (b) I=0.341 A; (c) I=0.335 A
Fig. 8. Testing results under different excitation currents for double magnetic lens system. (a) I1=0.240 A, I2=0.385 A; (b) I1=0.230 A, I2=0.385 A; (c) I1=0.220 A, I2=0.385 A; (d) I1=0.200 A, I2=0.385 A; (e) I1=0.180 A, I2=0.385 A
Fig. 9. Curved image surfaces fitted by measuring data for double magnetic lens system
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Table 1. Simulated best image positions and spatial resolutions for off-axis point objects
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Table 2. Measurement results of best image positions for off-axis point objects
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