The technology to make a large area master with the grating of optically variable device (OVD) is role in holographic image embossing.
制作具有光变图像（OVD）光栅条纹的大面积全息原版，是激光图像无油墨印刷的核心技术之一。
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By analyzing the mathematical model of the OVD, its practical example is given, and it is very important to improve the efficiency of logistics distribution and reduce cost.