Ghost diffraction and ghost imaging in two-color ghost imaging

Ghost diffraction and ghost imaging in two-color ghost imaging are investigated with pseudo-thermal light. Based on the extended Huygens-Fresnel integral, the ghost diffraction (GD) and ghost imaging (GI) condition in two-color ghost imaging has been demonstrated. It is shown that GD and GI fringes in two-color ghost imaging can be obtained by conforming the GI condition and GD condition, respectively. The exchange of ghost diffraction and ghost imaging can be obtained by only changing one of the wavelength of two-color source when compared with the signal-color ghost imaging, and the condition of GD and GI in signal-color ghost imaging are a special case of two-color ghost imaging. The simulation results agree well with the theoretical analysis.