Invention Grant
US09279927B2 Security device having optically variable device portion and method of making the same
有权
具有光学可变装置部分的安全装置及其制造方法
- Patent Title: Security device having optically variable device portion and method of making the same
- Patent Title (中): 具有光学可变装置部分的安全装置及其制造方法
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Application No.: US13767985Application Date: 2013-02-15
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Publication No.: US09279927B2Publication Date: 2016-03-08
- Inventor: Donald William Tomkins
- Applicant: OPSEC SECURITY GROUP, INC.
- Applicant Address: US CO Denver
- Assignee: OPSEC SECURITY GROUP, INC.
- Current Assignee: OPSEC SECURITY GROUP, INC.
- Current Assignee Address: US CO Denver
- Agency: Eckert Seamans Cherin & Mellott, LLC
- Agent Nathaniel C. Wilks
- Main IPC: C09K19/02
- IPC: C09K19/02 ; G02B5/30 ; B42D25/364 ; B42D25/324 ; B42D25/328
Abstract:
A security device includes a liquid crystal layer having one of a cholesteric phase, a nematic phase, and a cholesteric phase and having molecules therein aligned volumetrically in a predetermined manner to form a predetermined diffractive optical pattern or image. The molecules of the liquid crystal layer are volumetrically aligned in the predetermined manner through at least a portion of the thickness of the liquid crystal layer.
Public/Granted literature
- US20140232974A1 SECURITY DEVICE HAVING OPTICALLY VARIABLE DEVICE PORTION AND METHOD OF MAKING THE SAME Public/Granted day:2014-08-21
Information query
