Home > Archive>Volume 10, Issue 6, 2014 >411-414. DOI:10.1007/s11801-014-4150-3
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Novel metal-dielectric metameric optical filters for optical security devices
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1. Department of Electronic Engineering, Xiamen University, Xiamen 361005, China;;2. Energetic Opto (Fujian) Technology Co. Ltd, Putian 351115, China

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This work has been supported by the National Natural Science Foundation of China (No.61275050), and the Strategic Emerging Industries Foundation of Fujian Province (No.[2013]609).

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    Abstract:

    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.

    Reference
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    [7]W. J. Hu, S. Q. Tang and Z. F. Zhu, Modern Color Science and Application, Beijing Institute of Technology Press, Beijing, 2007. (in Chinese)
    [8]R. Y. Li, F. M. Liu, S. F. Zhang and Y. B. Jia, Shanghai Coatings 49, 12 (2011). (in Chinese)
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    [10]B. Hill, T. Roger and F. W. Vorhagen, ACM Transactions on Graphics 16, 109 (1997).
    [11]P. Yu, Research on Optical Thin-film Reflective Color Filters, Master Thesis, Zhejiang University, 2012. (in Chinese)
    [12]D. B. Judd and G. Wyszecki, Color in Business, Science and Industry, John Wiley & Sons, New York, 1975.
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GUO Rong, CHEN Nan, CHEN Lu-jian, WANG Xiao-zhong, CAI Zhi-ping, LI Yan-kai, BU Yi-kun. Novel metal-dielectric metameric optical filters for optical security devices[J]. Optoelectronics Letters,2014,10(6):411-414

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  • Received:August 19,2014
  • Online: October 06,2015
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