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    OPTICAL SECURITY COMPONENTS, MANUFACTURE OF SUCH COMPONENTS AND SECURE DOCUMENTS EQUIPPED WITH SUCH COMPONENTS
    1.
    发明公开
    OPTICAL SECURITY COMPONENTS, MANUFACTURE OF SUCH COMPONENTS AND SECURE DOCUMENTS EQUIPPED WITH SUCH COMPONENTS 审中-公开

    公开(公告)号：US20240262123A1

    公开(公告)日：2024-08-08

    申请号：US18575194

    申请日：2022-07-11

    申请人： SURYS

    发明人： Nelson Gananathan

    IPC分类号： B42D25/324 ,  B42D25/328 ,  B42D25/373 ,  G02B5/18

    CPC分类号： B42D25/324 ,  B42D25/328 ,  G02B5/1857 ,  B42D25/373

    摘要： An optical security component may include a first layer, a diffractive structure etched on the first layer, a second reflective layer covering the diffractive structure. The diffractive structure includes a first pattern consisting of a set of facets arranged to form various subsets of facets, each subset of facets including a facet with symmetry of revolution arranged concentrically. In each group of the subsets of facets, the subsets of facets present, in point regions defined by identical polar coordinates, a local alteration of the surface, such as to produce a recognizable graphic object for a given tilt angle and azimuth angle. The polar coordinates vary from one group to another, so as to produce a dynamic visual effect observable in reflection by change of tilt and/or azimuth.

    MICRO-OPTIC SECURITY DEVICE WITH PHASE ALIGNED IMAGE LAYERS
    2.
    发明公开
    MICRO-OPTIC SECURITY DEVICE WITH PHASE ALIGNED IMAGE LAYERS 审中-公开

    公开(公告)号：US20240253385A1

    公开(公告)日：2024-08-01

    申请号：US18631464

    申请日：2024-04-10

    申请人： Crane & Co., Inc.

    发明人： Samuel M. Cape ,  Jonathan D. Gosnell ,  Benjamin E. Bleiman ,  Paul F. Cote

    IPC分类号： B42D25/351 ,  B42D25/324 ,  B42D25/40 ,  B42D25/41 ,  B42D25/45

    CPC分类号： B42D25/351 ,  B42D25/324 ,  B42D25/40 ,  B42D25/41 ,  B42D25/45

    摘要： A micro-optic security device (105) includes a planar array of microlenses (305), which are configured to focus light along a plurality of focal paths (610) associated with a viewing angle. The micro-optic security device further includes an icon layer stack (905) disposed along the plurality of focal paths. The icon layer stack includes a first icon layer (620) with volumes of cured material of a first color (613b) and volumes of substantially transparent material at locations outside of focal paths of the first range of viewing angles. The icon layer stack also includes a second icon layer (640) with volumes of substantially transparent cured material at locations along focal paths of the first range of viewing angles, and volumes of cured material of a second color (637a) at locations along focal paths of a second range of viewing angles.

    Method of marking a diamond, markings formed from such methods and diamonds marked according to such method
    3.
    发明授权
    Method of marking a diamond, markings formed from such methods and diamonds marked according to such method 有权

    公开(公告)号：US12030217B2

    公开(公告)日：2024-07-09

    申请号：US17624332

    申请日：2020-07-24

    申请人： MASTER DYNAMIC LIMITED

    发明人： Yau Chuen Yiu ,  Ka Wing Cheng ,  Koon Chung Hui

    IPC分类号： B28D5/04 ,  B42D25/324 ,  B42D25/435

    CPC分类号： B28D5/04 ,  B42D25/324 ,  B42D25/435

    摘要： A process of forming a non-optically detectable authentication marking (110), includes the step of: applying a marking at a surface of a diamond (200) using a focused ion beam (FIB) writing process so as to provide a non-optically detectable authentication marking (110) which is formed by alteration in the optical characteristics of a portion of the diamond material at the outer surface of the diamond to form a marked portion; wherein the marking is optically invisible, and wherein the marking is viewable by an imaging method which provides an observable contrast between the portion of the diamond having altered optical characteristics and the non-marked portion of the diamond. The marking process can assist in the prevention of the counterfeiting of precious articles, and be of assistance in the incident of theft. A marking, a diamond, a process of viewing a marking on a diamond are further disclosed.

    PERSONALISED IMAGE FORMED FROM A METAL LAYER AND A LENTICULAR ARRAY
    9.
    发明公开
    PERSONALISED IMAGE FORMED FROM A METAL LAYER AND A LENTICULAR ARRAY 审中-公开

    公开(公告)号：US20240017563A1

    公开(公告)日：2024-01-18

    申请号：US18253794

    申请日：2021-11-23

    申请人： IDEMIA FRANCE

    发明人： Benoît BERTHE ,  Alban REMY ,  Paul AZUELOS

    IPC分类号： B42D25/328 ,  B42D25/324 ,  B42D25/346 ,  B42D25/373 ,  B42D25/387 ,  B42D25/435

    CPC分类号： B42D25/328 ,  B42D25/324 ,  B42D25/346 ,  B42D25/373 ,  B42D25/387 ,  B42D25/435

    摘要： A security document including a metal layer comprising an arrangement of diffractive nanostructures arranged periodically in the metal layer to form a diffractive holographic structure forming an arrangement of pixels each comprising a plurality of sub-pixels of distinct colors, a lenticular array comprising convergent lenses positioned facing the metal layer, and a support layer on which the metal layer is disposed so that the metal layer is sandwiched between the lenticular array and the support layer. The metal layer includes perforations formed by focusing laser radiation through the lenticular array on the metal layer, the perforations including at least one group of perforations produced by focusing the laser radiation at a respective angle of incidence to reveal a corresponding personalized image when the security document is observed at this angle of incidence.

    DOCUMENT AUTHENTICATION USING MULTI-TIER MACHINE LEARNING MODELS
    10.
    发明公开
    DOCUMENT AUTHENTICATION USING MULTI-TIER MACHINE LEARNING MODELS 审中-公开

    公开(公告)号：US20240005688A1

    公开(公告)日：2024-01-04

    申请号：US17809920

    申请日：2022-06-30

    申请人： Capital One Services, LLC

    发明人： Lawrence DOUGLAS

    IPC分类号： G06V30/413 ,  B42D25/324 ,  G06V30/418 ,  G06T7/00

    CPC分类号： G06V30/413 ,  B42D25/324 ,  G06V30/418 ,  G06T7/0002 ,  G06T2207/20081

    摘要： Methods and systems are described herein for providing multi-tier machine learning model processing for document authenticity. A document authentication system built based on the current disclosure may rely on a camera to capture an image of a document and use a multi-tiered machine learning infrastructure to identify security features associated with the image of the document and determine based on those features whether the document is authentic. Furthermore, using the disclosed methods and system enable the provider of the machine learning model to improve the document authentication system by training the multi-tier machine learning model based on millions of interactions collected as part of processing. In addition, the document authentication system enables tracking where/when particular instances of documents are scanned. Based on the tracking, the document authentication system may further identify instances of documents that are not authentic.