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 Drying of DCG holograms of several different gelatin species was performed by free-drying desorption and desorption method. It was found that the drying significantly increased the diffraction efficiency of the DCG hologram. For DCG holograms, which are inherently higher in the diffraction efficiency and modified gelatin, most of the diffraction efficiencies are above 85% after drying, and some are even close to the ideal 100%. In general, however, the increase in specific activity of the inert glue is greater at the same exposure; for the same gelatin, the low diffraction efficiency sheet, which is generally underexposed and overexposed, is typically moderately higher than the exposure The film adds more