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丹麦里瑟国家实验室的研究人员已演示一种无需化学处理就能产生全息图的即时全息工艺。研究小组从含偶氮苯的聚合物出发，采用传统双光束装置来实现偏振全息术。倍频Ｎｄ∶ＹＡＧ激光器输出的５３２ｎｍ光束可产生２０Ｈｚ重复率、５～７ｎｓ的Ｑ开关脉冲，峰值功率约为１．６?
Researchers at the Reese National Laboratory in Denmark have demonstrated an instantaneous holographic process that produces holograms without chemical treatment. The team started with azobenzene-containing polymers by using conventional dual-beam devices to achieve polarization holography. The 532nm beam output by a frequency doubling Nd: YAG laser produces a 20Hz repetition rate and a 5-7ns Q-switched pulse with a peak power of about 1.6?