Abstract:
The fundamental holographic properties of Polaroid's DMP-128 have been measured. Diffraction efficiencies over 90% have been obtained with an index modulation of 0.033. It was found that the diffraction efficiency could be reduced from 90% to less than 10% by the use of an index matching fluid. When the index matching fluid was allowed to evaporate, the diffraction efficiency returned to its original value. This observation suggests that the index modulation produced in the photopolymer is due to tiny cracks or voids formed in the polymer
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