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Proceedings Paper

Nanocomposite multilayer optically variable coatings
Author(s): Junxia Lu; Zhenquan Lai; Jiandong Wei; Huilin Zhang; Zhongsheng Deng; Qinyuan Zhang; Jue Wang
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Paper Abstract

The optically variable coatings can prevent counterfeiting of value documents. The cost of these coatings deposited by physical technology is very high. The sol-gel technology has the feature of a relatively lower cost and can be used to produce thin films with low refractive. We studied the optically variable coatings by the nano-composite technology (i.e., compound method of sol-gel technology and physical technology). The degree of color shift of some film structures with the viewing angle, including PET (substrate)/Cr/SiO2/Al and PET(sub.)/Cr/resin/Al etc., was calculated according to the color perception of human eyes. And the coatings produced were measured with the spectrometer.

Paper Details

Date Published: 29 November 2000
PDF: 4 pages
Proc. SPIE 4086, Fourth International Conference on Thin Film Physics and Applications, (29 November 2000); doi: 10.1117/12.408394
Show Author Affiliations
Junxia Lu, Tongji Univ. (China)
Zhenquan Lai, Tongji Univ. (China)
Jiandong Wei, Tongji Univ. (China)
Huilin Zhang, Tongji Univ. (China)
Zhongsheng Deng, Tongji Univ. (China)
Qinyuan Zhang, Tongji Univ. (China)
Jue Wang, Tongji Univ. (China)

Published in SPIE Proceedings Vol. 4086:
Fourth International Conference on Thin Film Physics and Applications
Junhao Chu; Pulin Liu; Yong Chang, Editor(s)

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