Ms. Yuanyuan Ning Profile

Yuanyuan Ning

Masters Student at Jiangnan Univ

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Proceedings Article | 19 January 2009 Paper

The Murray-Davies reflectance model of haltone fluorescent ink prints

Yuanyuan Ning, Yixin Zhang

Proceedings Volume 7241, 72411M (2009) https://doi.org/10.1117/12.808456

KEYWORDS: Luminescence, Reflectivity, Halftones, Absorption, Solids, Interfaces, Security printing, Light scattering, Visible radiation, Color prediction

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The color prediction of fluorescent ink security printing is a very concerned issus in the field of security printing quality control. This paper first analyzed the light transmission of solid fluorescent ink prints.We make the assumption that the absorption of ink layer and the the radiation of fluorescence are all occur on a very thin layer in the middle of ink layer.And the produced fluorescence are only in upward and downward direction. Under such assumption we analyze the light spreading in fluorescent ink layer of the absorption, scattering and fluorescence of radiation, respectively. So we divide the incidence into three parts. The first is the light reflecting by the air-ink interface.The second part is the upward and downward fluorescence which radiating by the thin fluorescence layer. The third part is the remanent incidence after the absorption of thin fluorescence layer.Through researching the three transmission beams in the dissemination of the dynamics of the ink layer we can calculate the light the reflectance and transmission of fluorescent ink layer using the iterative algorithm.Then using the Murray-Davies model which reflecting the light propagating in halftone ink layer we establish the new reflection Murray-Davies model of halftone fluorescent ink prints.

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