Methods for producing low-visibility retroreflective visual tags
US7387393B2 · kind B2 · utility
39Cited by
8References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2005 |
| Grant date | Jun 17, 2008 |
| Priority date | — |
| Expiry date | May 2, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2019/06225
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A process for producing a low-visibility retroreflective visual tag, which can be used to identify and/or determine the position of an object. This process involves placing an infra-red-blocking material over a retroreflective substrate to form the low-visibility retroreflective visual tag. This infra-red-blocking material is placed so as to form a pattern, which becomes visible to an infrared sensor when the low-visibility retroreflective visual tag is illuminated by an infra-red light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.