| 发明名称 |
SECURITY DEVICE HAVING OPTICALLY VARIABLE DEVICE PORTION AND METHOD OF MAKING THE SAME |
| 摘要 |
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. |
| 申请公布号 |
US2014232974(A1) |
申请公布日期 |
2014.08.21 |
| 申请号 |
US201313767985 |
申请日期 |
2013.02.15 |
| 申请人 |
OPSEC SECURITY GROUP, INC. |
发明人 |
TOMKINS DONALD WILLIAM |
| 分类号 |
G02F1/139;G02F1/1333 |
主分类号 |
G02F1/139 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A security device comprising:
a liquid crystal layer having one of a smectic 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, wherein 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. |
| 地址 |
Denver CO US |
