Compact fingerprint identification device
US6643390B1 · kind B1 · utility
51Cited by
7References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2000 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Apr 19, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1324
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A compact, low-cost finger imager, to be used for enrolling and recognizing individuals based upon their finger ridge patterns. The optical system employs viewing beyond the critical angle and darkfield illumination for maximum image contrast. The optical system is afocal and telecentric, achieving corrected distortion with oblique viewing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.