Reconstruction of spatial continuous distribution using improved Lohmann-Type CGHs

Computer-generated Holograms (CGHs) are widely used for constructing optical wave fronts from numerically objects. In this paper, we propose a novel type of speckle elimination method for Lohmann-type CGHs, which is called Iterative Speckle Reduction Algorithm (ISRA). This algorithm is proposed for the speckle reduction in the reconstruction of digital holograms. The speckles can be reduced by avoiding the isolated zeros among the sampled points of the reconstructed image. The results show that the speckle elimination method highly improved the traditional Lohmann-type method for image reconstruction.