Fig. 1. Scheme of the x ray absorption imaging device based on a polycapillary x ray lens.

Fig. 2. (a) Picture of the PPXRL. (b) Picture of the PCXRL. (c) Cross section of the outside of the PPXRL. The channel size is about 7 μm.

Fig. 3. Image of output beam of PPXRL at the distance of 30 cm from the CCD detector.

Fig. 4. X ray intensity distribution of the output beam of the PPXRL at a distance of 30 cm from the CCD detector.

Fig. 5. Distribution of the gain of the PPXRL at a distance of 30 cm from the CCD detector.

Fig. 6. Picture of the mesh used in the experiment.

Fig. 7. Image of the mesh at a distance of 20 cm from the PPXRL taken by the tomography device (a) with and (b) without the PCXRL.

Fig. 8. Corresponding intensity profiles of the images in Fig. 7(a) and 7(b).

Fig. 9. (a) Ratio of intensities in Fig. 8. (b) Image of Fig. 7 after flat-field correction.

Fig. 10. Image of the mesh in different places. (a) L1=20  cm and L2=2  cm. (b) L1=20  cm and L3=2  cm.

Fig. 11. Contrast of the images as a function of the distance between the detector and the outside of PCXRL (the red line), and between the sample and the inside of PCXRL (the black line).

Fig. 12. Distribution of the local angular divergence of the output beam from the PPXRL.