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Effect of processing procedures of reflection holograms in dichromated gelatin on their broadband characteristics

The effect of prehardening and processing procedure of dichromated gelatin (DCG) on the broadband characteristics of reflection holograms is researched in this paper. We present several parameters evaluating the performances of broadband reflection holograms, and establish a setup measuring diffraction efficiency of reflection holograms directly, and provides two methods for controlling DCG prehardening. The experiments are significant to the manufacture of reflection holograms in DCG.