Pre-compensation of an image blur in holographic projection display using light emitting diode light source

Holographic projection displays suffer from image blur when reconstructed from an incoherent light source like a light emitting diode. In this paper, we propose a method that enhances the reconstruction sharpness by pre-compensating the target image. The image blur caused by the incoherent nature of the light emitting diode is analyzed and the corresponding spatially varying point spread function is obtained. The pre-compensation is then performed using an iterative optimization algorithm. Finally, the hologram of the pre-compensated target image is loaded onto a spatial light modulator to obtain optically reconstructed image with reduced blur. The numerically simulated results and optically reconstructed results are in good agreement, showing feasibility of the proposed method.