Abstract
A systematic investigation has been carried out into the optimization of diffraction efficiency ( η) of methylene blue sensitized dichromated gelatin (MBDCG) holograms. The influence of the following parameters on η have been studied: prehardener concentration ( C H), concentrations of ammonium dichromate ( C A) and methylene blue ( C M) as photosensitizers, and exposure ( E). This study revealed that with C H ≃ 0.5, C A ≃ 30, C M ≃ 0.3, and E ≃ 400–600, optimum diffraction efficiency of over 80%, can be easily achieved in MBDCG holograms.
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