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科学家开发出新印刷技术 可以隐è—

导读：洛桑联邦理工学院（EPFL）科学家开发一种新印刷技术，两个图像被打印在相同位置处。　　　　洛桑联邦理工学院（EPFL）科学家开发一种新印刷技术，两个图像被打印在相同位置处。在任何给定时间，一个图像是隐藏的，另一个是可查看。要查看隐藏的对象，你只需旋转的照片，从而隐藏图像会显示成一张图。　　　　科学家开发出新印刷技术可以隐藏图像　　　　这个想法听起来很像从你的童年那些全息图的明星卡，但是这是一个复杂得多的技术。要创建效果，团队必须建立一个数学模型和软件能够预测图像将如何看从不同的角度观察到的效果。　　　　专家指出，这样的效果只作用在印刷在金属板上的作品，因为金属板有镜子般的特性。而纸漫反射的光在多个方向上，因此消除了出现这种效果必需的阴影。除了金属片，人们只需一个标准的喷墨打印机和必要的软件来创建隐藏的图片。　　　　洛桑联邦理工学院的实验室专家认为该技术有朝一日用于增强文档的安全性。使犯罪分子更难制造假币，信用卡，护照和其他证件。 村在çº

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