Fig. 1. Schematic diagram for FZP’s imaging.FZP成像示意图

Fig. 2. Spatial resolution of X-ray imaging by FZP versus incident light spectral bandwidth under different source sizes.不同光源尺寸下X射线FZP成像的分辨能力随入射光光谱带宽的变化

Fig. 3. Extended source model and its imaging results: (a) Extended source model; (b) image of extended source by FZP; (c) intensity distribution along y₂ axis in panel (b); (d) intensity distribution near y₂ = 0 in panel (c). 扩展光源模型及成像结果　(a) 扩展光源模型; (b) FZP对扩展光源成的像; (c) 图(b)中像沿虚线y₂方向的强度分布; (d) 图(c)中y₂ = 0附近的强度分布

Fig. 4. Spatial resolution in the field-of-view center and image contrast versus the size of extended source.视场中央分辨能力与像对比度随扩展光源尺寸的变化

Fig. 5. Images of an extended source with different spectral bandwidth: (a) w = 0.5%; (b) w = 1.6%; (c) w = 8%; (d) w = 12%. 扩展光源在不同光谱带宽下的成像　(a) w = 0.5%; (b) w = 1.6%; (c) w = 8%; (d) w = 12%

Fig. 6. Spatial resolution in the field-of-view center and the image contrast versus spectral bandwidth.视场中央分辨能力与像对比度随光谱带宽的变化

Fig. 7. Schematic diagram of experiment setup.实验安排示意图

Fig. 8. Images of 3 mm-diameter source for different spectral bandwidth, and the corresponding intensity distribution along x₂ axis: (a) w = 0.5%; (b) w = 1.5%; (c) w = 8%; (d) w = 12%. 扩展光源直径为3 mm时不同光谱带宽的成像结果及其沿x₂轴方向强度分布　(a) w = 0.5%; (b) w = 1.5%; (c) w = 8%; (d) w = 12%

Fig. 9. Experimental results for spatial resolution and image contrast in the field-of-view center versus spectral bandwidth.视场中央分辨能力与像对比度随光谱带宽变化的实验结果

Fig. 10. Experimental results for spatial resolution and image contrast in the field-of-view center versus extended source size.视场中央分辨能力与像对比度随扩展光源尺寸变化的实验结果