公开(公告)号：US20030174308A1

公开(公告)日：2003-09-18

申请号：US10373884

申请日：2002-11-25

申请人： Bundesdruckerei GmbH

发明人： Arnim Franz-Burgholz ,  Roland Gutmann ,  Harald Hoeppner ,  Thomas Loer ,  Detlef Martens ,  Gunther Dausmann ,  Zishao Yang ,  Robert Massen ,  Thomas Franz ,  Thomas Leitner ,  Jorg Eberhardt

IPC分类号： G06K009/74

CPC分类号： G06K7/1094 ,  G03H1/0011 ,  G06K7/10603 ,  G06K7/10722 ,  G06K19/16

摘要： An apparatus for evaluating distinguishing authenticity features comprising diffraction elements on a document which is illuminated by an illumination source. The distinguishing authenticity element which is to be examined, diffracts the beam of the illuminating source and projects it onto an evaluating unit in the device. In order to be independent of the nature and location of the diffraction pattern, the diffraction pattern derived from the document to be examined is projected onto a screen and the image of the pattern recorded and evaluated by a camera (matrix or cells).

摘要翻译： 一种用于评估由照明源照明的文件上的衍射元素的区别真实性特征的装置。 要检查的区别真实性元素衍射照射源的光束并将其投影到设备中的评估单元上。 为了独立于衍射图案的性质和位置，将从被检查文档导出的衍射图案投射到屏幕上，并且通过照相机（矩阵或单元格）记录和评估图案的图像。