Analysis on ghost image contrast using linearly polarized light

Ghost imaging has attracted a lot of attention since it was first demonstrated. However, the image contrasts of ghost imaging are usually unsatisfying and have became a main obstacle in ghost imaging application. In this article, the contrast of ghost image of a single-slit transmission mask using linearly polarized light is analyzed. The theoretical analysis and simulation demonstrated that the contrast of single-slit ghost image decreased as the angle between the direction of single-slit and the direction of polarization of light increased. Hopefully, this contrast-angle relationship will provide some reference for ghost imaging system setup.