Patent · US Active

Apparatus for optically directly recording skin prints for mobile applications

US11328531B2 · kind B2 · utility

0Cited by

3References

18Claims

0Family size

Assignee

JENETRIC GmbH · DE

Inventors

Philipp Riehl · Jena, DE
Holger Femel · Oelknitz, DE
Undine Richter · Jena, DE
Joerg Reinhold · Jena, DE

Key dates

Filing date	Sep 17, 2019
Grant date	May 10, 2022
Priority date	—
Expiry date	Sep 17, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG02B6/0076
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An apparatus for direct optical recording of skin prints has a display below the placement surface and a light guide layer below the display. The light guide layer has light in-coupling at a narrow side and light out-coupling structures in the surface. By means of angles ε of the light out-coupling structures and differences in the refractive indices of the neighboring layers, a directed coupling out of light occurs in the direction of the placement surface causing a total internal reflection at the placement surface. The display has a transparency of at least 1% of the coupled out light. A first and second adhesion layers are between the display and the light guide layer and between the light guide layer and the sensor layer. The refractive indices of the adhesion layers are at least 1% to 30% lower than those of light guide layer, the display and the sensor layer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.