【作者】 翟凤潇；

【导师】 黄明举；

【作者基本信息】 河南大学 ， 光学， 2006， 硕士

【摘要】 高密度数字化光学全息存储技术和记录材料成为下一代海量存储技术研究的热点。本文在总结了当前高密度光学信息存储技术和有机光致聚合物材料的存储原理、性能研究现状的基础上,围绕有机光致聚合物材料主要进行了以下几方面的工作:1.制备了一种核黄素敏化的以聚乙烯醇为基质的新型全息存储材料;通过实验的方法优化了光致聚合材料的各组成成分含量,从而得到一个优化后的配制方案。2.研究了材料的最大衍射效率、曝光灵敏度等静态参数随曝光时间、曝光能量和样品厚度的变化关系,并解释了变化原因。3.对光致聚合全息存储材料光化学反应过程和引起布拉格偏移的因素进行了分析;通过理论推导,得到了曝光时间与布拉格偏移量的关系。把实验的结果与理论分析进行比较,两者符合较好,说明对于布拉格偏移随时间变化动态过程的分析比较合理。4.分析了记录材料的噪声来源,研究了材料的透过率与随时间和入射角度变化的关系,说明了在曝光记录过程中有噪声光栅生成。5.在记录材料中存储了由空间光调制器生成的数字化信息页,再现信息有较高的保真度。更多还原

【Abstract】 High-density digital holographic data storage and recording materials have been becoming one of the hot issues of mass data information storage. On the base of the review of the process of high-density optical information storage technology, the holographic storage principle and characteristics of photopolymer, the study has been done about photopolymer recording materials in this dissertation as follows:1. A novel riboflavin sensitized photopolymer material based on polyvinyl-alcohol for holographic storage is fabricated; by optimizing the components of photopolymer, a reasonable optimal concentration is obtained.2. The dependences of the diffraction efficiency, exposure sensitivity as a function of exposure times, exposure energy and thickness of samples are investigated, and the causes of these changes are presented.3. Photo-induced reaction processes and factor of Bragg mismatch in the photopolymer for holographic storage are studied. On the basic of analysis of the theory, the relationship of Bragg mismatch and exposure time is deuced. The experimental results compare with analysis of the theory and they are fitted well. All those show that the analysis of the Bragg mismatch is reasonable.4. On the base of analysis of noise resource, the relationships of transmittance dependent on exposure times and scan angle are discussed, respectively. The presence of noise gratings of exposure process is demonstrated.更多还原