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中文摘要：
利用电润湿原理设计并实现了基于离子液体的变焦液体透镜。该透镜的聚焦电压与所使用的离子液体折光率直接相关,折光率越高,达到相同焦距所需的电压也越大。在相同情况下,与传统的盐水溶液变焦透镜相比,离子液体变焦透镜实现聚焦所需的电压更低。离子液体变焦透镜可以适应外界温度的剧烈变化,在高温条件下（〉80℃）仍可正常运转,且其性能甚至更优。该透镜的变焦范围可从5cm至无穷远,而其能耗只有毫瓦量级。离子液体在红外区透光性良好,使得离子液体变焦透镜在红外成像上有广阔的应用前景。
英文摘要：
Variable focus lens based on ionic liquids is investigated by using electrowetting. The presented results show that focusing voltages are strongly affected with reflective index, i.e. driving voltage to obtain identical focal length is remarkably increased with increasing reflective index. The focusing voltage of the lens （80 V） is quite lower than that of the saline lens （100 V）. Moreover, the lens exhibits excellent performance over saline lens such as good tolerance of sharply temperature varying, wide operating temperature which is up to 80 oC and in particular high stability at high temperature. The adjustable range of focal length varies from 5 cm to the infinite with energy consumption several tenths of a milliwatt low. Besides, it could have potential application in near-infrared image system.
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