-
1.发明申请公开(公告)号：US20050237616A1
公开(公告)日：2005-10-27
申请号：US11108090
申请日：2005-04-14
IPC分类号： B42D15/10 , G01N21/47 , G03H1/22 , G06K19/00 , G06K19/06 , G07D7/00 , G07D7/12 , G02B5/32 , G02B5/18
CPC分类号： G07D7/121 , G03H1/22 , G03H2001/221 , G03H2001/2223 , G03H2001/2231 , G03H2001/2244 , G03H2222/34 , G07D7/0032
摘要： The invention is directed to an arrangement and a method for checking optical diffraction structures (e.g., kinegrams) on documents. The object of the invention, to find a novel possibility for checking optical diffraction structures on documents which permits detection of the presence and authenticity of optical diffraction structures quickly and economically with respect to apparatus, is met according to the invention in that the sensor unit is arranged orthogonally above the support surface of the document, and in that the illumination unit contains at least two monochromatic light sources which are arranged so as to emit light bundles at defined incident angles with respect to a surface normal of the document directed to the diffraction structure and which can be switched on sequentially. At least one light source has an incident angle that corresponds in direction and degree to a diffraction angle at which an intensity maximum of the diffraction pattern that is generated in a structure-specific manner would occur if the diffraction structure were illuminated from the direction of the sensor unit.
摘要翻译： 本发明涉及一种用于检查文件上的光学衍射结构（例如，运动图）的布置和方法。 根据本发明，本发明的目的是为了发现在文件上检查光学衍射结构的新颖可能性，其允许根据本发明快速且经济地检测光学衍射结构的存在和真实性，因为传感器单元是 并且所述照明单元包含至少两个单色光源，所述至少两个单色光源被布置成相对于指向所述衍射结构的文件的表面法线以限定的入射角发射光束 并可依次打开。 至少一个光源具有对应于在衍射角度的方向和程度上的入射角，在该衍射角处，如果从衍射结构的方向照射衍射结构，则以结构特定的方式产生的衍射图案的强度最大值将发生 传感器单元。
-
2.发明授权公开(公告)号：US07345747B2
公开(公告)日：2008-03-18
申请号：US11108090
申请日：2005-04-14
IPC分类号： G06K9/74
CPC分类号： G07D7/121 , G03H1/22 , G03H2001/221 , G03H2001/2223 , G03H2001/2231 , G03H2001/2244 , G03H2222/34 , G07D7/0032
摘要： The invention is directed to an arrangement and a method for checking optical diffraction structures (e.g., kinegrams) on documents. The object of the invention, to find a novel possibility for checking optical diffraction structures on documents which permits detection of the presence and authenticity of optical diffraction structures quickly and economically with respect to apparatus, is met according to the invention in that the sensor unit is arranged orthogonally above the support surface of the document, and in that the illumination unit contains at least two monochromatic light sources which are arranged so as to emit light bundles at defined incident angles with respect to a surface normal of the document directed to the diffraction structure and which can be switched on sequentially. At least one light source has an incident angle that corresponds in direction and degree to a diffraction angle at which an intensity maximum of the diffraction pattern that is generated in a structure-specific manner would occur if the diffraction structure were illuminated from the direction of the sensor unit.
摘要翻译： 本发明涉及一种用于检查文件上的光学衍射结构（例如，运动图）的布置和方法。 根据本发明，本发明的目的是为了发现在文件上检查光学衍射结构的新颖可能性，其允许根据本发明快速且经济地检测光学衍射结构的存在和真实性，因为传感器单元是 并且所述照明单元包含至少两个单色光源，所述至少两个单色光源被布置成相对于指向所述衍射结构的文档的表面法线以限定的入射角发射光束 并可依次打开。 至少一个光源具有对应于在衍射角度的方向和程度上的入射角，在该衍射角处，如果从衍射结构的方向照射衍射结构，则以结构特定的方式产生的衍射图案的强度最大值将发生 传感器单元。
-
搜索结果
2 条记录 (耗时 0.016 秒)
