Optical fingerprint imaging system and method with protective film
US7515252B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 2005 |
| Grant date | Apr 7, 2009 |
| Priority date | — |
| Expiry date | Aug 31, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1329
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical fingerprint imaging system comprises an optically transparent platen and a protective film removably attached to the platen with an adhesive. The protective film protects the platen from scratches, pits, and other surface damage and is substantially chemically inert to petroleum-based substances which may come into contact when receiving a finger pressed to take a fingerprint image. The adhesive has a selected cohesive strength that allows the protective film and adhesive to be removed from the platen without leaving behind an adhesive residue. The protective film can be replaced periodically as part of maintenance of the platen to allow continued acquisition of accurate fingerprint images. A method for protecting a platen is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.