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12 条记录 (耗时 0.032 秒)

    OPTICAL DEVICE
    2.
    发明申请
    OPTICAL DEVICE 有权

    公开(公告)号：US20220373718A1

    公开(公告)日：2022-11-24

    申请号：US17771504

    申请日：2020-10-26

    申请人： Hydromecanique et Frottement ,  Manutech-USD ,  Université Jean Monnet Saint-Etienne ,  Centre National de la Recherche Scientifique

    发明人： Thomas KÄMPFE ,  Laurent DUBOST ,  Xxx SEDAO

    IPC分类号： G02B1/118 ,  G02B5/20

    摘要： The present invention relates to an optical device (1) suitable for transmitting/reflecting electromagnetic radiation in a wavelength range of the electromagnetic spectrum, said device (1) comprising at least: a first coating layer (10) made of a first material, a substrate (50) made of a material that is different from the first material, and surface texturing (60) forming cavities (61) in the device (1); wherein a lower layer (50) disposed directly below the first coating layer (10) is either a second coating layer (20) made of a material that is different from the first material, or the substrate (50); wherein the lower layer (50) has a determined thickness (E50); characterised in that the cavities (61) extend through the coating layer (20) and are sunk into the lower layer (50) through at least part of the thickness (E50).

    METHOD FOR BUILDING A SECURITY IMAGE BY MULTIPLEXING COLOR IMAGES
    8.
    发明申请
    METHOD FOR BUILDING A SECURITY IMAGE BY MULTIPLEXING COLOR IMAGES 有权

    公开(公告)号：US20210039422A1

    公开(公告)日：2021-02-11

    申请号：US16978429

    申请日：2019-03-05

    申请人： HID Global CID SAS ,  UNIVERSITÉ JEAN MONNET SAINT ETIENNE ,  CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE

    发明人： Marie Vangheluwe ,  Alice Vermeulin ,  Nathalie Destouches ,  Mathieu Hébert

    IPC分类号： B42D25/373 ,  B41M3/14 ,  B42D25/435

    摘要： A method for building a security image for a security structure of a security document from multiplexing color images, including selecting a marking method capable of producing sets of colors on the security document comprising different colors that can be displayed according to illumination/observation modes of the security structure, establishing a plurality of color sets that can be displayed by the security structure in a plurality of the different illumination/observation modes, distributing the color sets in a plurality of groups of color sets, establishing combinations of groups of color sets having at least one color set in common across the number of different illumination/observation modes, selecting a combination of a group of color sets based on the number of desired illumination/observation modes and the number of colors per color image, and determining the color images to multiplex by means of the combination of the group of color sets selected.