Abstract

Techniques for reducing reconstruction errors in computer-generated hologram design include the iterative application of constraints to the hologram and to its reconstruction and the noniterative application of error diffusion to the hologram. These techniques are combined such that the error resulting from the application of both Fourier and object domain constraints is spatially diffused at each iteration. To facilitate error diffusion in the object domain, object domain constraints are relaxed in that object magnitudes need only lie within a neighborhood about a desired magnitude. This relaxed constraint is referred to as soft coding as opposed to hard coding, in which case object magnitudes assume the desired magnitude.

© 1989 Optical Society of America