COMPUTER GENERATED HOLOGRAMS WITH REDUCED PHASE ERRORS

A rigorous elimination of the phase errors in a computer generated hologram is possible by using three apertures in each sampling cell and performing three Fourier transformations. Another way for reducing these errors approximately is the use of a larger object field. Both methods require a considerably higher amountof computation time. We compare their results in relation to their expense and propose a compromise, which also yields better reconstructions, but can be computed as quickly as a simple Lohmann hologram. © 1978.