Information code and information code reading apparatus
US9165230B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2013 |
| Grant date | Oct 20, 2015 |
| Priority date | — |
| Expiry date | Jun 15, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An information code includes a code region composed of a plurality of light-color modules and a plurality of dark-color modules. The code region includes a specified area which is preset and disables decoding of the information code by shielding light. The specified area is covered by a covering which exhibits a dark-color reflectance property when light of a first wavelength band is radiated thereto and which is transmissive to light of a second wavelength band. The first and second wavelength bands differ from each other. The light of the first wavelength band is visible light for example. Comparison between information code images imaged respectively on the light of the first and second wavelength bands makes it possible to determine whether the information code or an object with the information code is authentic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.