| 发明名称 |
System for authenticating an object |
| 摘要 |
A system for authenticating an object includes a label (12) with invisible indicia (14) on the object which rotates a polarization of incident light; a digital camera (18) having a light source (20), an image sensor (22), a first polarizing filter (24) having a first orientation, and a second polarizing filter (26) having a second orientation orthogonal to the first orientation; illuminating the label with light from the light source through the first linear polarizer; forming an image with the image sensor using reflected light from the label wherein the reflected light passes through the second polarizer prior to reaching the sensor; wherein the second linear polarizer makes the invisible indicia visible; and authenticating the object. |
| 申请公布号 |
US9094595(B2) |
申请公布日期 |
2015.07.28 |
| 申请号 |
US201313755329 |
申请日期 |
2013.01.31 |
| 申请人 |
Eastman Kodak Company |
发明人 |
Pawlik Thomas D.;Bose Judith A.;Cok Ronald S.;Blish Nelson A. |
| 分类号 |
G06K7/10;H04N5/225;G07D7/00;G07D7/12 |
主分类号 |
G06K7/10 |
| 代理机构 |
|
代理人 |
Blish Nelson Adrian |
| 主权项 |
1. A system for authenticating an object comprising:
a label with invisible indicia on the object which rotate a polarization of incident light; a digital camera having a light source, an image sensor, a first linear polarizer having a first orientation, and a second linear polarizer having a second orientation orthogonal to the first orientation; illuminating the label with light from the light source through the first linear polarizer; forming an image with the image sensor using reflected light from the label wherein the reflected light passes through the second polarizer prior to reaching the sensor; wherein the second linear polarizer makes the invisible indicia visible; and authenticating the object. |
| 地址 |
Rochester NY US |
