共查询到19条相似文献,搜索用时 218 毫秒
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制备了一种以番红花红T为光敏剂的新型全息存储材料,主要用Ar+激光器的514.5nm波长的绿光研究材料的全息特性.研究表明,该材料具有较高的衍射效率、曝光灵敏度和较大的折射率调制度,衍射效率近40%,灵敏度为7.22×10-4cm2/mJ,折射率调制度为3.65×10-4,同时,在读出时必须考虑布拉格偏移对全息存储的影响.在介质膜中存储了全息图像,再现图像较为清晰,说明该材料适合用作高密度全息存储介质.
关键词:
全息存储
光致聚合物
衍射效率
布拉格偏移 相似文献
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一种新型红敏光致聚合物全息特性研究 总被引:1,自引:0,他引:1
对一种新合成的红敏光致聚合物进行了一系列研究 ,实验表明用该材料制作的全息干板获得了近 70 %的实时衍射效率 ,从理论上解释了曝光量与衍射效率的关系曲线 ,并研究了该材料的其它特性。这些结果表明 ,该红敏光致聚合物材料具有较好的实时全息记录特性。 相似文献
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红敏聚乙烯醇/丙烯酰胺体系光致聚合物全息记录材料的空间分辨力增强研究 总被引:7,自引:0,他引:7
针对目前聚乙烯醇/丙烯酰胺体系光致聚合物材料的空间分辨力不高的问题,提出了一种采用低相对分子质量的聚乙烯醇作为成膜剂来改进光致聚合物分辨力的新方法.采用不同相对分子质量(72000,15000,9000)的聚乙烯醇成膜剂制成光致聚合物,对其衍射效率和空间分辨力等指标进行了对比实验.实验表明选用低相对分子质量(9000)的成膜剂可将该体系光致聚合物的分辨力提高到3000 line/mm以上,实验中仅需40 mJ/cm2左右的曝光量即可获得85%的衍射效率.另外,还对该材料的全息存储特性及其在角度复用全息存储方面的初步应用结果进行了报道. 相似文献
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用实验方法研究了一种新合成的绿光敏感光致聚合物的高密度全息存储性质.结果表明该种光致聚合物具有较高的衍射效率、大的动态范围和折射率调制度,适合做高密度数字全息存储的记录材料,但材料的灵敏度需要提高,同时读出过程必须考虑曝光过程所导致的布拉格偏移;利用角度复用技术在样品的同一位置记录了20个数字化数据信息页,存储密度达到0.125GBcm3,平均误码率达到5.15×10
关键词:
光致聚合物
高密度数字全息存储
布拉格偏移 相似文献
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制备了一种三乙醇胺与N-苯基苷氨酸为共同引发剂的丙烯酰胺基光致聚合物全息存储材料,并用He-Ne 激光器633 nm波长的光对样品进行曝光测试.实验表明,与单引发剂的光致聚合物相比,薄膜的质量有一定的提高,在曝光灵敏度变化不大的情况下,衍射效率有很大提高.优化两种引发剂浓度后,此种共同引发的光致聚合物材料呈现的衍射效率达到54%,曝光灵敏度为1.85×10-2cm2/mJ.还研究了此种光致聚合物的透过率随曝光时间和曝光强度的变化,说明此种光致聚合物材料内部均匀性好,对光的散射小. 相似文献
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制备了一种对整个可见光波段都敏感的光全息存储材料,并研究了该材料的透过率、衍射效率、灵敏度等全息特性.用He-Ne激光器633 nm和Ar+ 激光器514 nm,488 nm,476 nm四种波长的光曝光,材料的饱和衍射效率最大为66%,最小为48%;最高灵敏度为8.06×10-3 cm2/mJ.最高折射率调制度为4.22×10-4.用多波长存储时,不同波长的光可存储多幅全息图,且再现图像清晰.结果表明,该材料是较好的高密度数字全息存储材料. 相似文献
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A novel wideband sensitive dry holographic photopolymer sensitized by rose bengal (RB) and methylene blue (MB) is fabricated, the holographic storage characteristics of which are investigated under different exposure wavelengths. The result shows that the sensitive spectral band exceeds 200 nm in visible light range, the maximum diffraction efficiency under different exposure wavelengths is more than 40% and decreases with the decrease of exposure wavelength, the exposure sensitivity is not change with the exposure wavelength.This photopolymer is appropriate for wavelength multiplexing or multi-wavelength recording in digital holographic storage. 相似文献
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Dynamic analysis of holographic gratings in amulti-wavelength visible light sensitive photopolymer 下载免费PDF全文
A dynamic theoretical model of photochemistry and
hologram formation in holographic photopolymer is established, and
the dynamic development process of holographic gratings in the
photopolymer is discussed with the model. A novel multi-wavelength
visible light sensitive photopolymer for holographic storage is
prepared. The influence of exposure wavelength on holographic
storage characteristics is analysed. By fitting the experimental
data of transmittance and diffraction efficiency to a function of
time with different exposure intensities and wavelengths, the
variations of dynamic parameters of photochemistry and
photopolymerization diffusion are presented. 相似文献
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一种核黄素敏化的宽带全息记录材料 总被引:1,自引:1,他引: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,并研究了材料的全息特性.用Ar+激光器激发的488 nm的蓝光对材料曝光,结果表明该材料具有较高的衍射效率和曝光灵敏度,衍射效率高达53%,灵敏度为3.3 cm2/J,折射率调制度为4.5×10-4.研究了材料的透过率与随时间和入射角度变化的关系,说明在曝光记录过程中有噪音光栅生成.在存储介质膜中存储了全息图像,再现图像较为清晰,说明该材料适合用作高密度全息存储介质. 相似文献
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Holographic storage of three-dimensional image and data using photopolymer and polymer dispersed liquid crystal films 下载免费PDF全文
We present holographic storage of three-dimensional(3D) images and data in a photopolymer film without any applied electric field.Its absorption and diffraction efficiency are measured,and reflective analog hologram of real object and image of digital information are recorded in the films.The photopolymer is compared with polymer dispersed liquid crystals as holographic materials.Besides holographic diffraction efficiency of the former is little lower than that of the latter,this work demonstrates that the photopolymer is more suitable for analog hologram and big data permanent storage because of its high definition and no need of high voltage electric field.Therefore,our study proposes a potential holographic storage material to apply in large size static 3D holographic displays,including analog hologram displays,digital hologram prints,and holographic disks. 相似文献
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Caixia Sun 《Optik》2009,120(4):183-187
The acrylamide-based photopolymer, one kind of holographic storage material that contains the photoinitiation triethanolamine and N-phenylglycine, was prepared and compared with the photopolymer material containing one photoinitiator. The results indicate that this material shows attractive recording characteristics, which include diffraction efficiency, refractive index modulation, sensitivity and so on. Temporal changes in transmission efficiency with various incident intensities are studied; the angular width of the photopolymer material is also measured. 相似文献