Heated optical platen cover for a fingerprint imaging system
US5825474A · kind A · utility
49Cited by
3References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1995 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Oct 27, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/13
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention provides a movable cover for a finger receiving surface of an optical platen in a fingerprint imaging device. A heater incorporated into the platen cover applies controlled heat to the finger receiving surface when the cover is closed over the platen. Maintaining the finger receiving surface within a selected temperature range that is at about skin temperature helps to inhibit condensation of moisture from a subject's fingers onto the finger receiving surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.