Invention Grant
- Patent Title: Use of nanoparticles to tune index of refraction of layers of a polymeric matrix to optimize microoptic (MO) focus
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Application No.: US17612932Application Date: 2020-05-20
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Publication No.: US11945253B2Publication Date: 2024-04-02
- Inventor: Nancy J. Gettens , Jonathan D. Gosnell , Michael McAllister , Pearl N. Dickerson
- Applicant: CRANE & CO., INC.
- Applicant Address: US MA Dalton
- Assignee: Crane & Co., Inc.
- Current Assignee: Crane & Co., Inc.
- Current Assignee Address: US MA Dalton
- International Application: PCT/US2020/070065 2020.05.20
- International Announcement: WO2020/237260A 2020.11.26
- Date entered country: 2021-11-19
- Main IPC: C08F265/06
- IPC: C08F265/06 ; B42D25/29 ; B42D25/324 ; B42D25/351 ; B42D25/373 ; B82Y30/00 ; C08F283/06 ; C08K3/105 ; C08K3/22 ; C08K3/30 ; D21H19/58 ; D21H21/40 ; G02B1/04 ; G02B3/00 ; G02B27/16 ; B42D25/23 ; B42D25/24 ; B42D25/425

Abstract:
A security device includes an arrangement of image icon focusing elements, wherein each image icon focusing element of the arrangement of image icon focusing elements is associated with a focal path. The device further includes an image icon layer with one or more image icons associated with a first characteristic color and one or more image icons associated with a second characteristic color and one or more regions between the image icons comprising a volume of substantially colorless material. At a first viewing angle, a color is visible through each image icon focusing element, and the color visible through each image icon focusing element at the first viewing angle is based on one or more of the first characteristic color, the second characteristic color, or the substantially colorless material.
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