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    Security pigment
    1.
    发明授权
    Security pigment 有权

    公开(公告)号：US12152152B2

    公开(公告)日：2024-11-26

    申请号：US16894517

    申请日：2020-06-05

    Applicant: VIAVI SOLUTIONS INC.

    Inventor： Vladimir P. Raksha ,  Cornelis Jan Delst

    IPC: C09C1/00 ,  B41M3/14 ,  B42D25/29 ,  C09D11/037

    Abstract: A flake including a layer of a diamagnetic material; and at least one additional layer is disclosed. The flake, such as a plurality of flakes, can be dispersed in a liquid medium to form a composition. The composition can be applied to a surface of a substrate to form a security device. A method of making the security device is also disclosed.

    Orienting magnetically-orientable flakes
    2.
    发明授权
    Orienting magnetically-orientable flakes 有权

    公开(公告)号：US11193002B2

    公开(公告)日：2021-12-07

    申请号：US16330021

    申请日：2017-08-31

    Applicant: VIAVI SOLUTIONS INC.

    Inventor： Vladimir Raksha ,  Cornelis Jan Delst

    IPC: C08K3/01 ,  B05D3/00 ,  B05D5/06 ,  B05D3/06 ,  B42D25/369 ,  B42D25/41 ,  C09D5/23 ,  C09D7/40 ,  B41M7/00 ,  C08K7/00 ,  B41M3/14

    Abstract: According to examples, a substrate may be moved through a magnetic field, in which the substrate includes a fluid carrier containing magnetically-orientable flakes. The magnetic field may influence the magnetically-orientable flakes to be respectively oriented in one of multiple orientations. In addition, during movement of the substrate through the magnetic field, radiation may be applied onto a plurality of selected portions of the fluid carrier through at least one opening in a mask to cure the fluid carrier at the plurality of selected portions and fix the magnetically-orientable flakes in the plurality of selected portions at the respective angular orientations as influenced by the magnetic field.

    Matched interference pigments or foils having viewing angle dependent mismatch
    3.
    发明授权
    Matched interference pigments or foils having viewing angle dependent mismatch 有权

    公开(公告)号：US11079525B2

    公开(公告)日：2021-08-03

    申请号：US16113969

    申请日：2018-08-27

    Applicant: VIAVI Solutions Inc.

    Inventor： Cornelis Jan Delst ,  Matthew R. Witzman ,  Paul T. Kohlmann ,  Charles T. Markantes

    IPC: B29C70/58 ,  C09C1/00 ,  C09D5/36 ,  G02B5/22 ,  G02B5/28 ,  G02B27/00

    Abstract: A method of providing a configuration of a system of interference filters with a visible color shifting effect, includes: a hue matching step of identifying a configuration of a first interference filter including two first metal layers and a first spacer layer therebetween, and a configuration of a second interference filter including two second metal layers and a second spacer layer therebetween, wherein the first and second filters match in hue at the first viewing angle, and the mismatch in hue at the second angle; and a lightness adjustment step which may include modifying the layer material or the layer thickness of one of the metal layers; wherein a difference in lightness at the first viewing angle between the first and second modified filters is less that a difference in lightness at the first viewing angle between the first and second filters.

    Composition including a color shifting pigment and a color filter
    9.
    发明授权
    Composition including a color shifting pigment and a color filter 有权

    公开(公告)号：US11945972B2

    公开(公告)日：2024-04-02

    申请号：US18311790

    申请日：2023-05-03

    Applicant: VIAVI SOLUTIONS INC.

    Inventor： Cornelis Jan Delst ,  Paul Thomas Kohlmann

    IPC: C09D5/29 ,  B42D25/369 ,  B42D25/373 ,  B42D25/378

    CPC classification number: C09D5/29 ,  B42D25/369 ,  B42D25/378 ,  B42D25/373

    Abstract: A composition including a first color shifting pigment having a first color shift that extends from a starting color at normal through a plurality of colors as a viewing angle is increased to a final color, wherein the first color shift rotates counterclockwise relative to, and about, an origin of the L*a*b* color space; and a color filter that transmits a portion of the first color shift of the first color shifting pigment and absorbs a remainder of the first color shift of the first color shifting pigment; wherein the composition has a second color shift different from the first color shift; and wherein the second color shift has a first portion that rotates counterclockwise relative to the origin and a second portion that rotates clockwise relative to the origin is disclosed. A security device including the composition is included. A method of making the composition and a method of authenticating the security device are also disclosed.

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