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Switchable Fresnel lens based on micropatterned alignment

机译:基于微图案对准的可切换菲涅尔透镜

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摘要

In this Letter we disclose a method to fabricate a liquid crystal (LC) Fresnel zone lens (FZL) with higher efficiency. The LCFZL, based on alternate twisted nematic (TN) and planar aligned (PA) regions, has been prepared by means of a two-step photo-alignment process. The FZL profile for both optical regimes, i.e., in TN and PA alignment domains, generates the same focal length (f). Thus, the proposed LCFZL manifests double light intensity at the focal point and therefore offers double the efficiency of existing FZLs. Moreover, because of lower driving voltage and fast response, these elements could find application in many modern devices.
机译:在这封信中,我们公开了一种高效制造液晶(LC)菲涅尔带透镜(FZL)的方法。基于交替扭曲向列(TN)和平面排列(PA)区域的LCFZL已通过两步光对准过程制备。两种光学方案(即在TN和PA排列域中)的FZL轮廓均产生相同的焦距(f)。因此,提出的LCFZL在焦点处表现出两倍的光强度,因此提供了现有FZL效率的两倍。此外,由于较低的驱动电压和快速的响应,这些元件可以在许多现代设备中找到应用。

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