Space-variant processing using phase codes and Fourier-plane sampling techniques

This report discusses alternative approaches to using multiplex holography representing space-variant optical systems. The first part of the report presents the results of extensive computer simulations used in evaluating the effectiveness of Gold codes in encoding the multiple reference beams required in a sampled input/multiple reference beam realization of a space-variant system. The second part considers a totally different approach which samples the input plane and the transfer function plane. This latter approach eliminates crosstalk entirely, but requires multiple copies of the sampled input function during the playback step. The results of preliminary experiments conducted to evaluate this alternative approach for representing space-variant systems holographically are presented, including experiments verifying the coherent addition of the multiplexed holograms on playback using computer-multiplexed holograms.