Fingerprint sensor and fingerprint recognition system
US6891962B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1999 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | Sep 8, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1324
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A fingerprint sensor used for a fingerprint recognition system comprises a first prism or prism array including a first surface which a human finger is placed and a second surface; a lamp for irradiating the finger with light; a second prism or prism array for refracting the light which is reflected from the finger and subsequently passes through the second surface in such a way that the light refracted by the second prism or prism array travels along a path closer to a normal to the first surface of the first optical component than a path of light without refraction by the second prism or prism array; and an image sensor for receiving the light refracted by the second prism or prism array and converting fingerprint information for the finger into an electric signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.