Novel metal-dielectric metameric optical filters for optical security devices  

作　　者：郭榕 陈楠 陈鹭剑 王晓忠 蔡志平 李延凯 卜轶坤 

机构地区：[1]Department of Electronic Engineering, Xiamen University, Xiamen 361005, China [2]Energetic Opto (Fujian) Technology Co. Ltd, Putian 351115, China

出　　处：《Optoelectronics Letters》2014年第6期411-414,共4页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61275050);the Strategic Emerging Industries Foundation of Fujian Province(No.[2013]609)

摘　　要：Optical security devices play an essential role in the fight against counterfeiting. In this paper, we study and design a pair of metal-dielectric optical filters based on metameric effect, which offer a hidden image effect by the color shift at a specific angle of observation. Compared with all-dielectric multilayer system, the metal-dielectric multilayer structure has larger color shift with varying incident angle, higher color saturation and fewer layers. Finally, the stacks with 5 layers and 7 layers are achieved, and the color difference index is only 0.71, which shows good metameric matching effect. Simultaneously, the sensitivity of filters to deposition errors is analyzed when the thickness deviation is ±2%, and the results show that the two filters have good manufacturability.

关 键 词：dielectric saturation deviation matching multilayer hidden viewing fight violet colors 

分 类 号：TN713[电子电信—电路与系统]