一种激光彩虹全息印刷品的颜色测量方法

A New Method of Color Measurement for Laser Rainbow Holographic Printed Matter

由于激光彩虹全息印刷品表面光栅的特殊光学特性,其在白光下的成像会产生随机的彩虹干涉条纹,增加了全息印刷品颜色测量的难度。针对激光彩虹烟包印刷品的颜色测量问题,设计了一种全息印刷品的专用全息照明光源——穹顶光源,并以穹顶光源为照明基础构建了6通道线扫描电荷耦合器件(CCD)成像系统。在该环境下,采用基于主成分分析的光谱反射率重建方法对激光彩虹全息印刷品进行颜色测量。实验证明,提出的颜色测量方法,具有光谱重建精度高的特点,可以有效解决激光彩虹全息印刷品的颜色测量难题。

Owing to the special optical properties of surface gratings of laser rainbow holographic printed matter, the imaging by white light illumination can generate rainbow-colored interference fringes, which increase the difficulty of color measurement of holographic printed matter. To resolve this problem of laser rainbow cigarette packet product, a special light source--dome light which is special for holographic printed matter is designed, and a 6-channel line scanning charge coupled device （CCD） imaging system based on the dome light is constructed. In the environment, color measurement for laser rainbow holographic printed matter is made by using spectral reconstruction method based on principal component analysis technique. The experiments show that in spectral reflectance reconstruction, proposed method of color measurement has the characteristics of high-precision, and is effective to solve the problem of color measurement of laser rainbow holographic printed matter.