Test for the Method for Correcting the Atmospheric Seeing and the Diffraction Limit of A Telescope by Means of the 2-dimensional DFT Deconvolution——The Application of DFT to Astronomy(Ⅰ)

In this paper, the method for carrying out the imago reconstruction by means of the 2-dimensional diserele Fourier transform (DFT) is introduced in detail. A method for evaluating the optical transfer function (OTF) by the spectrum fitting is also presented. The really tested results obtained with the CCD system attached to the 1-m telescope show that the spatial resolution of the system increases by 275% and the binary stars that arc mixed in the original image are obviously separated from each other after the processing. Finally, the advantages and drawbacks of the method for the image reconstruction by using OFT arc also disscussed.