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
A bar code is made in the random grating lattice (diffuse reflection) area or to use together with the laser holographic anti-counterfeiting label to realize comprehensive anti-counterfeiting.
在随机光栅点阵(漫反射)区域上制作条形码或与激光全息防伪标识共同使用，可实现综合防伪。
3
Finally, some suggestions are made on how to raise the diffraction efficiency and enlarge the ruling area of the grating in terms of experiment.