干燥对不同明胶的DCG全息图衍射效率影响的研究

通过自由干燥脱附除水法对几种不同明胶的ＤＣＧ全息图进行了干燥实验，结果发现干燥大幅度地增加了ＤＣＧ全息图的衍射效率。对衍射效率本来就较高的活性胶和改性胶的ＤＣＧ全息图来说，干燥后使其大多数的衍射效率都在８５％以上，有的甚至接近理想值１００％。但一般来说，在相同曝光量下，惰性胶的比活性胶的增加更多；对于同一明胶来说，一般是曝光量不足和曝光量过度的低衍射效率片比曝光量适度的高衍射效率片增加更多

A Study on Effect of Drying on Diffraction Efficiencies of Dichromated Gelatin Holograms of Different Gelatins

This paper reports the study of the effect of free drying dehydration on diffraction efficiencies of dichromated gelatin holograms of different gelatins. It was found that the drying can greatly increase diffraction efficiencies of dichromated gelatin holograms, ranking from 30～45% to 55～80% for dichromated gelatin holograms of inert gelatins and from 75～90% to 90～100% for dichromated gelatin holograms of active and PA modified gelatins after drying. But at the same level of exposure, the diffraction efficiencies of dichromated gelatin holograms of inert gelatins generally increased more than those of active gelatins; However, for the same gelatin, the low diffraction efficiencies dichromated gelatin holograms of underexposure and overexposure increased more than the high diffraction efficiencies dichromated gelatin holograms of moderate expoosure. The reason why the diffraction efficiencies are changed by drying was discussed.