CMYK防伪印刷微镜阵列

Anti-counterfeiting of CMYK printing micro-mirror array

以印刷微镜的反射亮度、反射稳定性和CMYK颜色模式为基础,建立了一种新型的CMYK印刷微镜结构模型。利用微镜表面函数的雅可比行列式和梯度函数,对模型的表面反射亮度和稳定性进行了分析评价。结果表明:该结构模型表面函数的雅可比行列式近似为0,梯度函数随坐标变化而变化。因此,此结构模型表面的反射光具有足够大的亮度和稳定性,适用于创建基于位置和角度变化来改变光变图案反射密度的光学防伪效果。设计了一幅由不同CMYK印刷微镜组成的防伪光变图案,模拟了该防伪图案的印刷微镜阵列结构。

Based on the reflective brightness and stability of printing micro-mirror and CMYK color model, a new an- ti-counterfeiting model of CMYK printing micro-mirror is established. To analyze the brightness and stability of reflected lights on the surface of model, Jacobian and gradient of printing micro-mirror surface function are used. The analysis re- sults show that Jacobian which is the surface of printing micro-mirror model is almost zero and the gradient of printing micro-mirror surface constantly changes when the coordinate values change. Therefore, it is proved that reflected lights of printing micro-mirror surface have sufficient brightness and stability and it is suitable to create anti-counterfeiting optical variable device, which change the density of reflected light when position and angle of viewing are changed. It takes some printing micro-mirror of different CMYK values to design an anti-counterfeiting optical variable device and simulate the structure of printing micro-mirror array.