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This paper, “New idea for recording x-ray imaging holography," was presented as part of International Conference on Space Optics—ICSO 1997, held in Toulouse, France.

A ne method to record x-ray in-line holograms with quasi- equal-path is proposed in this paper, the key is using a micro zone plate. This method has several advantages over the traditional x-ray in-line holography. First, the requirement of the temporal coherence for the x-ray beam is very low. Second, it reduces the requirement of the resolution of recording media, and last it weakens the disturbance of the twin image. The method can also be used to measure the spatial coherence of x-ray with a single exposure.

In this paper, aberrations in reconstruction are analyzed, and aberration elimination method are discussed, and the feasibility of direct reconstruction of lensless Fourier transform x-ray hologram with visible light is investigated.

The requirements for the temporal coherence in x-ray holography are theoretically analyzed. The conclusion is that the temporal coherence length required is a quadratic function of the resolution in x-ray holography.

Aberrations in in-line and lensless Fourier transform x-ray hologram are analyzed quantitatively based on two typical experiments. Some conclusions are also given correspondingly.