Method for preserving the diffraction efficiency and the contrast of a dynamic holographic memory and dynamic holographic memory device

摘要

The invention relates to a method for preserving the efficiency and the contrast of holographic images stored in the form of multiplexed interference gratings in a holographic optical memory (1), in which method the images whose diffraction efficiency and contrast are desired to be preserved are read, and then an image corresponding to a read image is written into the memory during a predetermined time Tw. The invention also relates to a dynamic holographic optical memory implementing this method. <IMAGE>