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1·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。

2·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.

并在分析其数学模型的基础上，给出了实例分析，对提高物流配送效率和降低成本具有重要意义。