Markova Bistra, Nazarova Dimana, Sharlandjiev Peter
Institute for Optical Materials and Technologies-Bulgarian Academy of Sciences, Sofia, Bulgaria.
Appl Opt. 2011 Oct 1;50(28):5534-7. doi: 10.1364/AO.50.005534.
Dichromated gelatin (DCG) is one of the best light-sensitive materials for holographic recording. However, strict technological control should be observed during deposition, gelation, and drying of DCG plates and the chemical processing of the recorded structures. Usually, for reflection holograms the gelatin layer should be sealed in order to protect it from ambient humidity, which affects the value and position of the reflection maximum. Herein we give three different recipes for tuning the reflection maximum from 430 to 700 nm by swelling the hologram thickness with a filler material that is commercially available. The mechanism of the hologram swelling, which changes the period of the recorded holographic structure, is also briefly discussed.
重铬酸盐明胶（DCG）是用于全息记录的最佳光敏材料之一。然而，在DCG板的沉积、凝胶化和干燥以及记录结构的化学处理过程中，应严格遵守技术控制。通常，对于反射全息图，明胶层应进行密封，以保护其免受环境湿度的影响，环境湿度会影响反射最大值的数值和位置。在此，我们给出三种不同的配方，通过使用市售填充材料使全息图厚度膨胀，将反射最大值从430nm调至700nm。还简要讨论了全息图膨胀的机制，该机制会改变记录的全息结构的周期。
