SOFT-X-RAY IN-LINE HOLOGRAPHIC EXPERIMENT

''Water window'' soft X-ray has some advantages in the microimaging of biological specimens. Soft X-ray holography can give us three-dimensi onal images of biological cells in their natural condition. Quasi-mono chromatic soft X-ray from the polymonochromatic synchrotron radiation is obtained by a zone plate-pinhole linear monochromator at National S ynchrotron Radiation Laboratory (NSRL) at Hefei. The pinhole is used t o increase the temporal coherence of the soft X-ray, and also to incre ase the spatial coherence of it. An in-line holographic experiment has been finished with soft X-ray of main wavelength 4.5 nm and pinhole o f diameter 0.03 mm. The magnified hologram is reconstructed with He-Ne laser. A smaller pinhole is wanted to be used to improve the coherenc e of the soft X-ray so as to improve the quality of the hologram.