Scaleable, compact, high resolution optical fingerprint reader
US8564653B2 · kind B2 · utility
1Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2010 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Feb 20, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1324
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A fingerprint reader for acquiring a fingerprint image has a platen with a micro prism sheet on its underside. An arrangement of fold mirrors is used to receive light from the platen and fold the optical path twice before reaching the imagers. The reader has multiple imagers, each imager having at least an imaging lens and an image sensor. Each imager is configured so that the image plane of the image sensor is tilted relative to the optical axis of the imaging lens, such that keystone distortion in the fingerprint image is corrected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.