A Novel Method of Spectrum Extraction Based on Fourier Telescopy in the Laboratory

Fourier Telescopy (FT) is an active high-resolution imaging technique. In the laboratory, the interference fringes which are essential to spectrum extraction are obtained by changing the position of beams. The theory about spectrum extraction is introduced in this paper, and iterative algorithm of restoring the target spectrum is presented also. A novel method of beam-moving is proposed, and has been compared with other two existed methods. The results show that the novel method can reduce the complexity of light path and simplify the control program and the algorithm about data processing. Given conclusions will be significant for the FT technique.