Study on Fourier-Transform Ghost Imaging with Partially Coherent X-Ray

TAN Zhijie1,2 YU Hong1 LU Ronghua1 ZHAO Xin1 HAN Shensheng1

(1.Key Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China 201800)
(2.University of Chinese Academy of Sciences, Beijing, China 100049)

【Abstract】In the ghost imaging, a pseudo-thermal light source is generated by illuminating a diffuser with coherent light. However, in the X-ray region, the incident light of a pseudo-thermal light source is partially coherent, and the spatially partial coherence of the light has a great influence on the imaging quality. The influence of the X-ray partial coherence on the second-order correlation function of pseudo-thermal light source is analyzed theoretically using the Gaussian-Schell model. The simulation results based on the statistical optics are also given. Both the theoretical and simulated results show that the visibility and resolution of the ghost imaging are influenced by the X-ray spatial coherence. In the case of limited spatial coherence, the visibility of X-ray Fourier-transform ghost imaging can be improved by using a pinhole in front of the diffuser, and the width of the pinhole should be equal to the transverse coherent length of the X-ray. It will be beneficial to achieve the wide applications of X-ray Fourier-transform ghost imaging.

【Keywords】 imaging systems; ghost imaging; X-ray imaging; partially coherent; pseudo-thermal light source;

【DOI】

【Funds】 Major Program of National Natural Science Foundation of China (11627811)

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This Article

ISSN:0253-2239

CN: 31-1252/O4

Vol 37, No. 04, Pages 137-144

April 2017

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Article Outline

Abstract

  • 1 Introduction
  • 2 Theoretical model
  • 3 Simulation analysis on light source
  • 4 Simulation analysis on FGI
  • 5 Conclusions
  • References