Multiplexed counter-beam speckle holograms in bichromated gelatin

Experimental data on the recording and multiplexing of shifted counter-beam holograms with a speckle reference beam are presented. The experiment conf irmed the possibility of multiplexing shear speckle holograms by shifting t he photosensitive material by a distance equal to the reference beam speckl e size. As the number of multiplexed holograms increases, their lifetime in a layer of bichromated gelatin significantly decreases. (C) 2000 MAIK "Nau ka/Interperiodica".