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公开(公告)号:US5808776A
公开(公告)日:1998-09-15
申请号:US535292
申请日:1996-02-15
CPC分类号: G03H1/22 , B42D25/29 , G02B5/1842 , G03H1/041 , B42D25/328 , G03H1/0011 , G03H2001/2273
摘要: Method for the production of an optically variable image including an animated element used as the model for the reproduction of a security element, by insolation of a light-sensitive material through two coherent light beams. The image is broken down into a plurality of elementary images, each corresponding to an optical effect defined by a color, the time when the image elements appear and their duration. A plurality of masks is provided, each including a number of windows defining an elementary image. Two light beams are used to light the entire substrate surface and the substrate is isolated by successively placing each mask on the substrate and in the path of the light beams. The first light beam is stationary while the second light beam is emitted from an illumination surface with adjustable dimensions and position, so as to produce a given optical effect for each elementary image.
摘要翻译: PCT No.PCT / FR95 / 00255 Sec。 371日期:1996年2月15日 102(e)日期1996年2月15日PCT提交1995年3月3日PCT公布。 WO95 / 23986 PCT公开 日期1995年9月8日通过两个相干光束照射感光材料,生产包括用作安全元件的再现模型的动画元件的光学可变图像的方法。 图像被分解为多个基本图像,每个基本图像对应于由颜色定义的光学效果,图像元素出现的时间及其持续时间。 提供了多个掩模,每个掩模包括限定基本图像的多个窗口。 两个光束用于照亮整个基板表面,并且通过将每个掩模连续地放置在基板上和光束的路径中来隔离基板。 第一光束是静止的,而第二光束从具有可调节尺寸和位置的照明表面发射,以便为每个基本图像产生给定的光学效果。