Enhancement of storage density for multiplexing of image information by using a spatial filter

A spatial-filter multiplexing method is proposed to enhance the storage den sity in a thin photopolymer film. The formula for the selectivity Delta the ta was derived, and it was compared with the experimental results. A select ivity Delta theta of less than 0.1 degree was achieved. The storage density obtained by using spatial-filter multiplexing was compared to the storage density of conventional shift multiplexing, and it was proven that spatial- filter multiplexing was able to enhance the storage density by more than ab out 40 times compared to that achieved with conventional shift multiplexing in a photopolymer thin film.