29 November 2000 Nanocomposite multilayer optically variable coatings
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Proceedings Volume 4086, Fourth International Conference on Thin Film Physics and Applications; (2000); doi: 10.1117/12.408394
Event: 4th International Conference on Thin Film Physics and Applications, 2000, Shanghai, China
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.
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Junxia Lu, Zhenquan Lai, Jiandong Wei, Huilin Zhang, Zhongsheng Deng, Qinyuan Zhang, Jue Wang, "Nanocomposite multilayer optically variable coatings", Proc. SPIE 4086, Fourth International Conference on Thin Film Physics and Applications, (29 November 2000); doi: 10.1117/12.408394; https://doi.org/10.1117/12.408394
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KEYWORDS
Optical coatings

Thin film coatings

Nanocomposites

Positron emission tomography

Reflectivity

Sol-gels

Thin films

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