Fourier Telephoto Surgery Target Reconstruction

Fourier Telescopy is an active imaging method that can form images of very dim objects with super-resolution by means of Fourier transform, attained the spectrum of object by interacting with interference pattern of different domain frequency. This paper mainly included the following aspects:Firstly, the principle of Fourier Telescopy is introduced, and numerical simulated Fourier telescopy system, calculates the reconstruction and Strehl of object with multiple antenna configuration. The results shows that antenna array in equal distance with "T" transmitter geometry has N antennas in each arm,which satisfied the condition on Spatial Resolution of reconstruction is L/2N, while target size is L×L and image resolution is 2N×2N.Through reconstructing from multiple practical objects, the reconstruction has better target recognition is testified, which number of antenna on each arm NL approached 10.Secondly, the issue related to Fourier Telescopy realizing is studied. In order to study the effect of atmospheric turbulence on uplink in Fourier telescopy, computed Image Strehl of the reconstructions by means of power spectrum in different atmospheric model, which included HV21 MHV21 and SLC-Day models. These 50 results showed that the effect of atmospheric turbulence on object reconstruct is tolerable.In addition, calculated number of bits for A/D conversion and SNR, the results showed in order to get proper quality in reconstruction, the A/D conversion need exceed 16bits. While sampling in one period, the SNR of FT system need exceed 65dB, which degraded 30dB by means of sampling in multiple period.Finally, the experiment system of Fourier Telescopy based on 3 beam is introduced and showed some results about experiment.