摘要
介绍了一种以聚乙烯醇为粘结剂 ,丙烯酰胺和亚甲基双丙烯酰胺作为单体 ,赤藓红和亚甲基蓝作为光引发剂 ,三乙醇胺作为共引发剂的光致聚合物材料。材料能同时对红光和绿光敏感 ,用红光和绿光分别对材料曝光 ,测得的两种衍射效率分别不低于 30 % ,灵敏度不低于 2 5cm2 /J。该材料对红光的最大响应空间频率为 2 2 74lp/mm ,相应的衍射效率为 2 7.73% ,响应范围为 16 0 0～ 2 80 0lp/mm ;对绿光的最大响应空间频率为 2 35 0lp/mm ,相应的衍射效率为 2 5 .72 % ,响应范围为 170 0～ 30 0 0lp/mm。在材料的同一点上进行红光和绿光的波长复用全息存储 ,当用红光或绿光再现时单幅图像清晰 ,信噪比高 ,两幅图像之间无任何干扰 ,该材料适合双波长全息存储。
A novel type of photopolymer holographic reco rd ing materials sensitive to red light and green light is presented. The photopoly merizable system comprises two monomers, a photoinitiation system, and an inacti ve component referred to as a binder. Diffraction efficiencies are no less 30%, and sensitivities are no less 25 cm2/J when exposed to red light and green lig ht respectively. Spatial frequencies of red light ranged from 1600～2800 lp/mm, and the best response spatial frequency is 2274 lp/mm and the corresponding diff raction efficiency is 27.72%. Spatial frequencies of green light ranged from 170 0～3000 lp/mm, and the best response spatial frequency is 2335 lp/mm and the cor responding diffraction efficiency is 25.72%. There is no crosstalk among reconstruction images when recording in the same point by red and green light, so t he photopolymer is promising to two-wavelength multiplexing holographic storage .
出处
《光学学报》
EI
CAS
CSCD
北大核心
2004年第8期1099-1102,共4页
Acta Optica Sinica
基金
国家自然科学基金 (6 0 2 770 2 8)资助课题
关键词
光学材料
光致聚合物
衍射效率
灵敏度
双波长全息存储
optical materials
photopolymer
diffraction effici ency
sensitivity
two-wavelength multiplexing holographic storage
