Holographic gratings with different spatial frequencies recorded on BB-640 bleached silver halide emulsions using reversal bleaches
Holographic gratings with different spatial frequencies recorded on BB-640 bleached silver halide emulsions using reversal bleaches
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DOI：
10.4028/www.scientific.net/msf.480-481.543
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发表时间：
2005-01-01
期刊：
影响因子：
--
通讯作者：
Pascual, I
中科院分区：
文献类型：
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作者：
Alvarez, ML;Camacho, N;Pascual, I
在用于全息应用的记录材料领域中进行的研究已经产生了改进质量的材料。感光乳剂在这项研究中发挥了重要作用，因为尽管这是第一种用于记录目的的材料，但有一系列特性将感光乳剂转化为非常有趣的全息记录材料。在这项工作中，我们将提出一个逆转漂白过程的优化。该工艺主要用于Agfa 8 E75 HD乳剂，但在与BB-640乳剂一起使用时，仍然严重缺乏有关该工艺的信息。BB-640和Agfa 8 E75 HD乳剂之间存在一些差异，例如明胶的硬化程度、平均粒度或乳剂厚度。必须考虑到这些差异，以便使用与BB-640平板相同的Agfa平板常用化学程序。例如，这些差异之一，即乳剂中存在的银颗粒的平均尺寸，直接影响记录在乳剂中的最终全息图的散射。它将被证明，使用超细颗粒乳剂，如BB-640，允许获得全息图具有高衍射效率和低吸收和散射。特别是，在这项工作中的逆转漂白程序将被优化的衍射光栅记录在BB-640乳剂不同的空间频率。
The research made in the field of recording materials for holographic applications has yielded to materials of improving quality. Photographic emulsions have played an important role in this investigation, since although this is the first material used for recording purposes, there are a series of characteristics that convert the photographic emulsion in a very interesting material for holographic recording. In this work we will present the optimisation of a reversal bleaching process. This process has been largely used for Agfa 8E75 HD emulsions, but there is still a significant lack of information about it when used with BB-640 emulsions. There are some differences between BB-640 and Agfa 8E75 HD emulsions such as the degree of hardening of the gelatin, the mean grain size or the emulsion thickness. These differences must be taken into account in order to use the same chemical procedures commonly used for Agfa plates with BB-640 ones. For instance, one of these differences, the mean size of the silver halide grains present in the emulsion, influences directly in the scattering of the final hologram recorded in the emulsion. It will be demonstrated that the use of ultra-fine grained emulsions, such as BB-640, allows obtaining holograms with high diffraction efficiencies and low absorption and scattering. In particular, in this work a reversal bleach procedure will be optimised for diffraction gratings recorded with different spatial frequencies on BB-640 emulsions.