Reducing the crosstalk effect in phase-only spatial light modulators based on double-phase method

Abstract This study proposes a method for reducing the crosstalk effect in phase-only spatial light modulators (SLMs) for double-phase holograms (DPHs). New encoding equations for DPHs are deduced according to the crosstalk model of the SLM. The crosstalk effect of the SLM is obtained via measurement of the diffraction efficiency of binary phase gratings as opposed to measurement of the point spread function. The results of experiments indicate that this method can significantly improve the image quality of DPHs in the optical reconstruction.