Fig. 1. Principle of projection magnification imaging

Fig. 2. Schematic diagram of nano-CT imaging using modified SEM device^[9]. (a) Optical path diagram of X-ray point source projection magnification; (b) main structure and components of modified SEM for obtaining nano-light source; (c) geometric principle of cone-beam CT imaging system; (d) virtual cross section of tomographic dataset

Fig. 3. Structural diagram of coupling of fiber and detector^[27]

Fig. 4. Structural diagram of coupling of lens and detector^[29]

Fig. 5. Comparison of optical microscope and X-ray microscope. (a) Imaging schematic of visible light microscope; (b) imaging schematic of soft X-ray microscopy; (c) imaging schematic of hard X-ray microscope

Fig. 6. X-ray nano CT imaging system with zone plate^[39]

Fig. 7. Structural diagram of zone plate. (a) Structural diagram of classical zone plate; (b) structural diagram of multilayer film Laue mirror^[48]

Fig. 8. Structural diagram of composite lens. (a) Planar composite refractive lens; (b) spherical composite refractive lens^[91]

Fig. 9. Schematic diagram of elliptical type Bragg amplifier^[95]

Fig. 10. Diagram of structure of X-ray Bragg amplifier^[96]

Fig. 11. Schematic diagram of capillary focusing

Fig. 12. Single capillary focusing diagram (left) and multi-capillary focusing diagram (right)

Table 1. Classification of nano-CT imaging systems

Table 2. Classification and important parameters of common X-ray focusing components