Media validation
US6605819B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 5, 2001 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | Jul 31, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D7/1205
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method of validating selected properties of media includes: providing a sensor having a monochromatic light source and a light detector, with the detector being positioned to receive only diffusely reflected light from the source; locating the media in the path of the sensor; activating the light source, and detecting light diffusely reflected from the media to provide an output from the detector containing data relating to the response of the media to the light source; moving the media with respect to the sensor so as to gather sample data from different areas of the media; processing the sample data to determine a selected characteristic of the media; and comparing the sample data against a reference database of data obtained from genuine media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.