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    OPTICAL SECURITY ELEMENT
    31.
    发明公开
    OPTICAL SECURITY ELEMENT 审中-公开

    公开(公告)号：US20240198715A1

    公开(公告)日：2024-06-20

    申请号：US18595021

    申请日：2024-03-04

    Applicant: VIAVI SOLUTIONS INC,

    Inventor： Vladimir P. RAKSHA ,  Cornelis Jan Delst

    IPC: B42D25/369 ,  B42D25/40

    CPC classification number: B42D25/369 ,  B42D25/40

    Abstract: An assembly including a first magnet; a substrate positioned above the first magnet, and having a surface for receiving a composition including a plurality of magnetizable platelets; and a second magnet, positioned above the substrate is disclosed. The assembly can be used in a method of making an optical security element. The optical security element and the method of making the optical security element are also disclosed.

    Optical security element
    32.
    发明授权
    Optical security element 有权

    公开(公告)号：US11945255B2

    公开(公告)日：2024-04-02

    申请号：US17839013

    申请日：2022-06-13

    Applicant: VIAVI SOLUTIONS INC.

    Inventor： Vladimir P. Raksha ,  Cornelis Jan Delst

    IPC: B42D25/369 ,  B42D25/40

    CPC classification number: B42D25/369 ,  B42D25/40

    Abstract: An assembly including a first magnet; a substrate positioned above the first magnet, and having a surface for receiving a composition including a plurality of magnetizable platelets; and a second magnet, positioned above the substrate is disclosed. The assembly can be used in a method of making an optical security element. The optical security element and the method of making the optical security element are also disclosed.

    OPTICAL SECURITY DEVICE BASED ON A SURFACE OF REVOLUTION
    34.
    发明申请
    OPTICAL SECURITY DEVICE BASED ON A SURFACE OF REVOLUTION 有权

    公开(公告)号：US20220026844A1

    公开(公告)日：2022-01-27

    申请号：US17448932

    申请日：2021-09-27

    Applicant: VIAVI Solutions Inc.

    Inventor： Vladimir P. RAKSHA ,  Cornelis Jan Delst

    IPC: G03G21/04 ,  B41M3/14 ,  G07D7/12

    Abstract: An optical article printed on a substrate may include an organic binder; and a plurality of reflective magnetic platelets provided in the organic binder, wherein the plurality of reflective magnetic platelets are substantially aligned in accordance with at least part of a surface of revolution, and wherein the plurality of reflective magnetic platelets are aligned to cause a first reflective effect of the optical article when the substrate is rotated around a first axis and to cause a second reflective effect of the optical article when the substrate is rotated around a second axis, wherein the first reflective effect is different from the second reflective effect.

    Flakes with undulate borders and method of forming thereof
    36.
    发明授权
    Flakes with undulate borders and method of forming thereof 有权

    公开(公告)号：US10308812B2

    公开(公告)日：2019-06-04

    申请号：US15257396

    申请日：2016-09-06

    Applicant: Viavi Solutions Inc.

    Inventor： Alberto Argoitia ,  Cornelis Jan Delst ,  Laurence Holden

    IPC: B05D3/00 ,  C09C1/00 ,  B82Y30/00 ,  G02B5/18 ,  C09D7/40

    Abstract: The invention provides a plurality of substantially same planar pigment flakes, each formed of one or more thin film layers. Each flake has a face surface and a flake border delimiting the face surface; the flake border undulates in the plane of the flake. The flakes have a pre-selected shape, may have a symbol or a grating thereon. A method of manufacturing of these flakes including the steps of: (a) providing a substrate having a plurality of one-flake regions and a plurality of depressions or protrusions disposed therebetween and not extending into the one-flake regions, (b) coating the substrate with a releasable coating, and (c) removing the releasable coating and breaking it into the flakes; wherein two adjacent of the one-flake regions are separated by at least three of the depressions or protrusions for facilitating the breaking of the releasable coating into the flakes.

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