All-dielectric metameric filters for optically variable devices
In order to increase the anti-counterfeiting performance of optically variable devices, the innovative interference security image structures based on metamerism have been developed. In this letter, we show a pair of all-dielectric metameric filters offering a hidden image effect with the color shif...
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| Published in: | Chinese optics letters Vol. 12; no. 1; pp. 31 - 34 |
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| Main Author: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2014
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | In order to increase the anti-counterfeiting performance of optically variable devices, the innovative interference security image structures based on metamerism have been developed. In this letter, we show a pair of all-dielectric metameric filters offering a hidden image effect with the color shift at a specific angle of observation. These filters are designed by two materials TiO/SiO2 based on the different angle color target optimization. The 6-layer- and 9-layer stacks are achieved and the performance of prototype filters prepared by remote plasma sputtering is shown. The color difference index of the experiment is up to 1.19, which shows good metameric matching effect. |
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| Bibliography: | 31-1890/O3 In order to increase the anti-counterfeiting performance of optically variable devices, the innovative interference security image structures based on metamerism have been developed. In this letter, we show a pair of all-dielectric metameric filters offering a hidden image effect with the color shift at a specific angle of observation. These filters are designed by two materials TiO/SiO2 based on the different angle color target optimization. The 6-layer- and 9-layer stacks are achieved and the performance of prototype filters prepared by remote plasma sputtering is shown. The color difference index of the experiment is up to 1.19, which shows good metameric matching effect. Yikun Bu , Rong Guo , Yankai Li , Zengyou Meng , Nan Chen （ 1Department of Electronic Engineering, Xiamen University, Xiamen 361005, China 2Energetic Opto （Fujian） Technology Co., Ltd, Putian 351115, China） |
| ISSN: | 1671-7694 |
| DOI: | 10.3788/COL201412.S10604 |