Skin detection sensor
US8098900B2 · kind B2 · utility
4Cited by
21References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2007 |
| Grant date | Jan 17, 2012 |
| Priority date | — |
| Expiry date | Nov 1, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/062
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for detecting the presence of human skin including an illuminator source for providing an IR band at a predetermined frequency known as a blue LED. The IR band frequency ranges from about 400 nanometers (nm) to about 500 nm, and preferably from about 450 nm to about 485 nm. Most preferred is a blue LED with a frequency of about 468 nm. The band is reflected off a target and received by a sensor such as a photo detector. The value for human skin is compared to the signal detected. Other materials that have been used to spoof detectors have different values and thus are distinguished from human skin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.