天文高分辨率观测与图像退卷积初步试验

HIGH RESOLUTION ASTRONOMICAL OBSERVATIONS AND IMAGERY DECONVOLUTION EXPERIMENT

自本世纪五、六十年代起人们才开始认识到超越经典衍射极限的分辨率在原则上是可能的.本文详细剖析了瑞利极限只是一个"视觉"极限.采用退卷积的数学方法,与适当的观测技术配合,完全可能得到天文观测的高分辨率,甚至超分辨率.并用计算机模拟资料和天文实测资料进行了实验,说明CLEAN方法不能提高分辨率增益,但是,FFT技术则是可行的.

It has begun to be known that superresolution is possible in principle since the fifties-six-ties. In this paper it is analysed in detail that the Rayleigh's criterion is only a visual limitation. With available mathematical deconvolution method and effective observation technique, it is possible to get high resolution Astronomical observations, even super-resolution. As a result of computer simulation and Astronomical interference observations, it is clear that CLEAN method could not enhance resolution, but FFT technique indeed does.