Getting the observation result of high space resolution ratio is one of the important targets of the astronomy observation. Especially, extended astronomy objective research, such as sun, seriously needs the result of high space resolution ratio observation. But the ground-telescope can’t actualize diffraction limit image owing to the effect of turbulent atmosphere. At present, there are two main methods- High Resolution Ratio Statistical Reconstruction method and Adaptive Optics that eliminate the effect of turbulent atmosphere and approach to the diffraction limit image. Comparatively, High Resolution Ratio Statistical Reconstruction method is easily actualized because it doesn’t need wavefront exploration and wavefront revision system. High Resolution Ratio Statistical Reconstruction method is to make statistics of objective short –exposal image, which keep high frequency information statistics, and from the result of statistics, it reconstructs high resolution objective image. Through the study on statistical transfer function of the Statistical Reconstruction method, the reconstruction effect of its Statistical Reconstruction method is to be found out. In the preface and first chapter, the essay gives the brief introduction to the development course of the Statistical Reconstruction method and some of the representative Statistical Reconstruction methods. On the basis of this, integrating with the former research, the chapter two goes deep into the discussion of the statistical transfer function of some Statistical Reconstruction methods and the numerical recipes. Noise in the image and telescope aberration is unavoidable in the actual systems. These two factors impact on the statistical result of Statistical Reconstruction method. The research on the effect of noise on the statistical result in the speckle image has been carried out deep. But, by far, nobody has ever tried to systematically study on the effect of the telescope aberration on the statistical results. In the chapter three, it studies on the effect of telescope aberration on the statistical results of the Statistical Reconstruction method through some simulative experimentation and the results of some actual observation. In the chapter four, it points out new methods that it is put to use Statistical Reconstruction method to estimate the telescope aberration, and carries out some simulative experimentation. Compared with the frequency statistical reconstruction method, the space statistical reconstruction method has some advantages that its calculating speed is faster and its noise suppression effect is more obvious. But, at present, it is only used into multi-point objective reconstruction such as binary star. The application to extended astronomy objective reconstruction is still in phase of investigation and simulation experimentation because “Correlation Maximal position error ratio” of the extended astronomy objective is higher than multi-point objective. The chapter five discusses the effects of objective figure and short exposal image noise on the effect of Correlation Maximal position error distribution, and compares effect of extended astronomy objective of space statistical reconstruction method with frequency statistical reconstruction method by simulative experimentation.
修改评论