Fig. 1. Schematic diagram of optimal surface shape of X-ray focusing lens

Fig. 2. Schematic diagram of comparison between elliptical and parabolic aperture size under same curvature radius

Fig. 3. Schematic diagram of parabolic column hole-type CRL

Fig. 4. Variation curves of focal length of CRL of different materials with photon energy

Fig. 5. Schematic diagram of femtosecond laser precision machining technology platform

Fig. 6. Interface of femtosecond laser precision machining control software

Fig. 7. Schematic diagram of machining path for parabolic column holes

Fig. 8. Schematic diagram of front-back composite machining mode

Fig. 9. Morphology of parabolic column hole diamond CRL processed by high repetition rate femtosecond laser

Fig. 10. Cross section morphology of CRL processed by high repetition rate femtosecond laser and Raman spectrum test results