Fingerprint image optical input apparatus
US6259108A · kind A · utility
149Cited by
6References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1998 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Oct 9, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2224/48091
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A fingerprint optical input apparatus comprises a contact image sensor for viewing a moving finger and providing a high contrast image. A narrow strip of the fingerprint touching a transparent platen is illuminated by sheet of collimated light at an oblique angle to the surface. The fingerprint image is viewed by frustrated total internal reflection by a GRIN rod lens array and projected onto a linear array sensor. Various embodiments of the platen provide a compact design by using TIR or mirror reflections of the fingerprint image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.