Abstract The application of two types of alternative action on gelatin in the layers of dichromated gelatin (DCG) was considered: structuring with the use of selective light tanning by the radiation of a He–Cd laser ( $$\lambda=440$$ nm) and destruction performed by exposure of layers to short-wave ultraviolet radiation ( $$\lambda<270$$ nm). The crucial role of UV exposure of samples in generating high-frequency relief-phase gratings with diffraction efficiency higher than 50 $$\%$$ on DCG layers thinner than 2 $$\mu$$ m is shown. It is noted that the application of traditional treatment methods of DCG layers leads to smoothened relief due to action of surface tension forces at high spatial frequencies. In addition, significant broadening of the domain of registered spatial frequencies (up to 1500 mm $${}^{-1}$$ ) for recording relief holographic gratings is achieved by applying the modified technique of gelatin treatment based on reduced time of water procedures and by using the isopropanol baths for quick layer dehydration.

中文翻译：

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暴露于短波紫外辐射的重铬酸盐明胶上浮雕高频全息结构的产生机制

摘要 考虑了对重铬酸盐明胶 (DCG) 层中明胶的两种替代作用的应用：使用 He-Cd 激光（$$\lambda=440$$ nm ) 和通过将层暴露于短波紫外线辐射 ($$\lambda<270$$nm) 进行破坏。显示了样品的紫外线照射在比 2 $\mu$$ m 薄的 DCG 层上生成衍射效率高于 50 $$\%$$ 的高频浮雕相位光栅的关键作用。值得注意的是，由于表面张力在高空间频率下的作用，DCG 层的传统处理方法的应用导致平滑的浮雕。此外，