公开(公告)号：US5621515A

公开(公告)日：1997-04-15

申请号：US366181

申请日：1994-12-29

申请人： Hidekazu Hoshino ,  Kazuhiro Kitada

发明人： Hidekazu Hoshino ,  Kazuhiro Kitada

IPC分类号： G03H1/22 ,  G03H1/04 ,  G06K7/00 ,  G06K7/12 ,  G06K19/06 ,  G06K19/18 ,  G06K9/74 ,  B42D15/00 ,  G03H1/00 ,  G06K7/10

CPC分类号： G03H1/041 ,  G06K19/18

摘要： In an article identification system comprising a plurality of identification regions affixed on an article, a light emitting device for impinging an illuminating light beam onto at least some of the identification regions, a light receiving device for detecting light diffracted by the identification regions, and a determination unit for determining the authenticity of the article according to a pattern of diffracted light detected by the light receiving device, the identification regions consist of a combination of effective and ineffective identification regions which are hardly distinguishable by naked eyes. Thus, the potential forger is not able to know which regions are indeed effective without having any access to a genuine optical reader/writer, and has to duplicate all of the identification regions at a substantial cost and requiring a substantial amount of effort. On the other hand, the genuine optical reader/writer can simply disregard all of the ineffective identification regions, and the cost of the article identification system can be substantially reduced. Therefore, for given effort and cost, the effectiveness of the article identification system to discourage illicitly duplication can be increased.

摘要翻译： 一种物品识别系统，其特征在于，包括附着在物品上的多个识别区域，用于将照明光束照射在至少一部分识别区域上的发光装置，用于检测由所述识别区域衍射的光的光接收装置，以及 确定单元，用于根据由光接收装置检测的衍射光的图案来确定物品的真实性，识别区域由肉眼几乎难以区分的有效和无效识别区域的组合组成。 因此，潜在的伪造者无法知道哪些区域确实有效，而无需访问真正的光学读取器/写入器，并且必须以相当大的成本复制所有识别区域并且需要大量的努力。 另一方面，真正的光学读取器/写入器可以简单地忽略所有无效的识别区域，并且可以显着地减少物品识别系统的成本。 因此，为了付出努力和成本，可以增加文章识别系统阻止非法复制的有效性。