用于X射线成像的菲涅耳波带片望远镜II：平行和发散光束的数值模拟
Fresnel zone plate telescopes for X-ray imaging II: numerical simulations with parallel and diverging beams
摘要：
我们提出的波带片望远镜，可能有一到四对波带片的阴影的模拟结果。从阴影中我们重建了各种情况下的图像。我们讨论了望远镜分辨率的物理基础，并通过我们的模拟证明了这一点。我们允许的源是在一个有限的距离（发散光束），以及在一个无限的距离（平行光束），并表明，分辨率恶化时，源附近。通过重建波带片的方式，这两个波带片对着相同的立体角在源，我们得到了高分辨率，即使在一个有限的距离源。我们提出了模拟结果的观测银河系的中心，并表明，不同强度的源可以重建的精度。这些模拟的结果将在解释最近发射的日冕-光子卫星的X射线图像方面有很大的用处。
英文摘要：
We present the results of simulations of shadows cast by a zone plate telescope which may have one to four pairs of zone plates. From the shadows we reconstruct the images under various circumstances. We discuss physical basis of the resolution of the telescope and demonstrate this by our simulations. We allow the source to be at a finite distance (diverging beam) as well as at an infinite distance (parallel beam) and show that the resolution is worsened when the source is nearby. By reconstructing the zone plates in a way that both the zone plates subtend the same solid angles at the source, we obtain back high resolution even for sources at a finite distance. We present simulated results for the observation of the galactic center and show that the sources of varying intensities may be reconstructed with accuracy. Results of these simulations would be of immense use in interpreting the X-ray images from recently launched CORONAS-PHOTON satellite.
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