Demonstration of patterned polymer-stabilized cholesteric liquid crystal textures for anti-counterfeiting two-dimensional barcodes
Demonstration of patterned polymer-stabilized cholesteric liquid crystal textures for anti-counterfeiting two-dimensional barcodes
复制标题
用于防伪二维条码的图案化聚合物稳定胆甾型液晶纹理的演示
DOI：
10.1364/ao.56.000601
复制
发表时间：
2017-01-20
期刊：
影响因子：
1.9
通讯作者：
Chen, Lu-Jian
中科院分区：
文献类型：
--
作者：
Li, Wen-Song;Shen, Yuan;Chen, Lu-Jian
我们评估了通过两步紫外线诱导聚合方法将具有平面和垂直纹理的周期性排列的正方形嵌入到具有可显影调制（DM）型胆甾型液晶（CLC）指纹纹理的背景中的可行性。棋盘图案光学衍射元件可以被视为二维 (2D) 条形码的变体，首次实现，并研究了衍射行为对入射光偏振和施加电压的依赖性。利用 DM 型指纹纹理的自然随机性和不可控变化，实现具有二维条形码图案的聚合物稳定 CLC (PSCLC) 图形符号，并具有难以伪造或复制的增强防伪功能。结果表明，非均匀DM型指纹光栅的复用、交叉偏振光读出和独特的偏振衍射特性可以提高安全水平。 (C) 2017年美国光学学会
We evaluated the feasibility of embedding periodically arranged squares with planar and vertical texture into a background with a developable-modulation (DM) type cholesteric liquid crystal (CLC) fingerprint texture by a two-step ultraviolet-induced polymerization method. Checker-patterned optical diffractive elements, which can be seen as a variation of a two-dimensional (2D) barcode, were first realized and the dependence of diffraction behaviors on incident light polarization and applied voltage were investigated. Taking advantage of the natural randomness and uncontrollable variations of a DM-type fingerprint textures, a polymer-stabilized CLC (PSCLC) graphic symbol with a 2D barcode pattern was then implemented with enhanced anti-counterfeiting features that are difficult to falsify or duplicate. The results indicate that the multiplexing of nonuniform DM-type fingerprint gratings, cross-polarized light readout, and unique polarization diffraction characteristics can improve the level of security. (C) 2017 Optical Society of America