The Theoretical Research Of Higher-order Correlation Imaging

Correlated imaging, which is also known as coincidence imaging or ghost imaging, is a brand-new imaging theory that derives from quantum theory. The peculiar properties manifests have become one of the hot topics in the frontier researches of optics in recent years. According to the findings, with the increase of the correlation order in the correlated imaging, the visibility is also improved. Hence, the research of higher-order correlation is great significance.In this paper, the visibility of the higher-order correlated imaging is studied theoretically.It is found that the intensity and wavelength of the illuminant, as well as the distance from the illuminant to the object to be tested will exert influence on the visibility. Through the study of the experimental scheme concerning the higher-order correlated imaging, a new scheme of imaging is proposed. it is to expand the light path of the signal in the imaging system on the premise of equal number of order. It is found that when the light path in the imaging system is expanded, the visibility of the imaging system can be significantly improved.Furthermore, the higher-order correlated imaging plan is also verified through numerical simulation. According to the findings, the new scheme improves the quality of imaging and raises the speed substantially. In addition, it is also found that with the increase of superposition, the quality of imaging is also enhanced. The conclusion is consistent with the theory, which lays a solid foundation for the subsequent experiment.