Rotational aperture synthesis for x rays
Rotational aperture synthesis for x rays
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DOI：
10.1364/josaa.3.002167
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发表时间：
1986-12
影响因子：
1.9
通讯作者：
L. Mertz;G. Nakano;J. Kilner
中科院分区：
文献类型：
--
作者：
L. Mertz;G. Nakano;J. Kilner
X射线区域的孔径合成可以用旋转调制准直器阵列来完成。Hermitianizing配方提取正弦和余弦分量从一对准直仪为每个条纹间距，傅立叶合成，然后重建图像。点扩展函数具有低旁瓣，适用于扩展源。蒙特卡罗模拟被用来说明和评估量子噪声的统计效应。从正约束重建中可以预期甚至更好的图像。轴向不对准的点扩散函数的影响示出。这一结论是对该阵列作为硬x射线天文望远镜的有利评价。
Aperture synthesis for the x-ray region can be accomplished with an array of rotation modulation collimators. A Hermitianizing recipe extracts sine and cosine components from a pair of collimators for each fringe spacing, and Fourier synthesis then reconstructs the images. The point-spread function has low sidelobes and is applicable with extended sources. A Monte Carlo simulation is used to illustrate and evaluate the statistical effects of quantum noise. Even better images may be expected from positively constrained reconstruction. The effects of axial misalignment on the point-spread function are illustrated. The conclusion is a favorable appraisal of the array as an astronomical telescope for hard x rays.