Hologrm Recording with Highly Sensitive Photopolymer Material

使用高灵敏度光聚合物材料进行全息记录

• 批准号: 03650713
• 负责人: KOSEKI Kenichi
• 金额: $ 0.96万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03650713/
• 关键词: Volume Hologram; Relief Hologram; He-Ne Laser Recording; Photopolymer; Photopolymerization; Chemically Amplified Photoresist; Squarilium Dye; 体積位相型ホログラム; 記録材料; 色素増感光重合; フォトポリマ-

The photographic and holographic characteristics of photopolymer spectrally sensitized with squarilium dye(SQD) were investigated under He-Ne laser exposure. The photopolymer layr consists of four components : matrix polymer, multifunctional monomer (pentaerythritol triacrylate) or acid-activatable crosslinker (hexamethoxymethyl melamine), 2,4,6-tris(trichloromethyl)-s-stiazine(TCT) and SQD.TCT acts as a radical generator and an acid generator at the same time. When TCT was used as the photoinitiator by itself without sensitizer, the sensitivity appeared only ultraviolet wavelength shorter than 300nm. Therefore it is difficult to use it as a photo-radical or photo-acid generator of visible light imaging material. The dye has a wavelength of absorption maximum at 633nm. By combining TCT with SQD, the range of spectral sensitivity was remarkably extended toward red-light spectral region. TCT gave a radical and an acid simultaneously by electron transfer mechanism from photoexcited SQD to TCT.Lippmann hologram with a high diffraction efficiency(98%) was recorded by the photopolymerization system. Relief hologram with high diffraction efficiency(>30%) was recorded by the chemically amplified resist system. The sensitivity of hologram recording of the order of 1 mJ/cm^2 was obtained for He-Ne laser light.

研究了方形染料(SQD)光谱敏化的光致聚合物在He-Ne激光照射下的照相和全息特性。光聚合物LAIR由四个组分组成：基质聚合物、多官能团单体(季戊四醇三丙烯酸酯)或酸活化交联剂(六甲氧甲基三聚氰胺)、2，4，6-三(三氯甲基)-S-噻嗪(TCT)和SQD。TCT同时作为自由基生成剂和酸生成剂。当单独使用TCT作为光引发剂而不使用增感剂时，感光度仅出现在300 nm以下的紫外光波长。因此，很难将其用作可见光成像材料的光自由基或光酸生成器。该染料的最大吸收波长为633 nm。通过将TCT和SQD相结合，光谱灵敏度范围显著向红光光谱区域扩展。通过光激发Sqd到TCT的电子转移机制，TCT同时给出了一个自由基和一个酸，并用光聚合系统记录了高衍射率(98%)的Lippmann全息图。用化学放大抗蚀剂系统记录了高衍射效率(~gt；30%)的浮雕全息图。对于He-Ne激光，全息记录的灵敏度达到1mJ/cm~2量级。